Herbicidal mixtures

ABSTRACT

A synergistic herbicidal mixture comprising A) picolinafen; or one of its environmentally compatible salts; and B) a synergistically effective amount of at least a sulfonylurea of formula II, wherein the variables A, B, X and R 1  to R 3  have the meanings given in the specification; and, if desired, C) at least a safener. Compositions comprising these mixtures, processes for the preparation of these compositions and their use for controlling undesired plants.

The present invention relates to a synergistic herbicidal mixturecomprising

-   A) picolinafen (I)

or one of its environmentally compatible salts; and

-   B) a synergistically effective amount of at least a sulfonylurea of    formula II

wherein

A is A1, A2, A3, A4 or A5

-   -   wherein    -   R⁴ is halogen, C₁-C₄-haloalkyl, C₁-C₄-alkoxy, C₁-C₄-haloalkoxy,        C₁-C₂-alkoxy-C₁-C₄-alkoxy, cyclopropylcarbonyl,        di(C₁-C₄-alkyl)amino-carbonyl or hydroxycarbonyl;    -   R⁵ is hydrogen, halogen or C₁-C₄-alkylsulfonylamino-C₁-C₄-alkyl;    -   R⁶ is hydroxycarbonyl or C₁-C₄-alkylsulfonyl;    -   R⁷ is hydrogen or C₁-C₄-haloalkyl;    -   R⁸ is hydroxycarbonyl;    -   R⁹ is 2-methyl-tetrazol-5-yl or hydroxycarbonyl;    -   R¹⁰ is hydrogen or halogen;    -   R¹¹ is C₁-C₄-alkyl;    -   R¹² is halogen or C₁-C₄-alkylsulfonyl;

B is —O—, —NH—, —CH₂— or a bond;

R¹ is hydrogen or C₁-C₄-alkyl;

R² is halogen, C₁-C₄-alkyl, C₁-C₄-haloalkyl, C₁-C₄-alkoxy,C₁-C₄-haloalkoxy, C₁-C₄-alkylamino or di(C₁-C₄-alkyl)-amino;

R³ is C₁-C₄-alkyl, C₁-C₄-haloalkoxy or C₁-C₄-alkoxy;

X is CH or N;

or one of its environmentally compatible salts or esters;

and, if desired,

-   C) at least a safener selected from the group of dichlormid,    benoxacor, LAB 145 138, MG-191, furilazole, cyometrinil,    oxabetrinil, fluxofenim, flurazole, naphthalic acid anhydride,    fenclorim, fenchlorazole-ethyl, mefenpyr, isoxadifen, cloquintocet,    1-ethyl-4-hydroxy-3(1H-tetrazol-5-yl)-1H-quinolin-2-one,    4-carboxymethyl-chroman-4-carboxylic acid,    N-(2-methoxybenzyl)-4-(3-methylureido)-benzene-sulfonamide and    (3-oxo-isothiochroman-4-ylidenmethoxy)acetic acid methyl ester;

or one of its environmentally compatible salts, esters or amides.

The invention furthermore relates to herbicidal compositions comprisinga herbicidally active amount of a synergistic herbicidal mixture asdefined above and at least one liquid and/or solid carrier and, ifdesired, at least one surfactant.

Moreover, the invention relates to processes for the preparation ofthese compositions and to a method of controlling undesirablevegetation.

WO 94/07368 and WO 01/26466 disclose mixtures of picolinafen withspecial further herbicides. However, in crop protection products, it isalways desirable to increase the specific activity of an activeingredient and the reliability of action. It is an object of the presentinvention to increase the activity and/or selectivity of picolinafenagainst undesirable harmful plants.

We have found that this object is achieved by the mixtures defined atthe outset. We have furthermore found herbicidal compositions whichcomprise these mixtures, processes for their preparation, and methods ofcontrolling undesirable vegetation. In the last-mentioned cases, it isirrelevant whether the herbicidally active compounds of group A), B)and, if desired, C) are formulated and applied jointly or separately andin which sequence they are applied in the case of separate application.

The mixtures according to the invention show a synergistic effect; thecompatibility of the herbicidally active compounds of group A), B) and,if desired C) for certain crop plants is generally retained.

The compounds of component A) may exist, or be used, in the form oftheir environmentally compatible salts; the compounds of component B)may exist, or be used, in the form of their environmentally compatiblesalts or esters and, if desired the compouunds of component C) mayexist, or be used, in the form of their environmentally compatiblesalts, esters and amides.

Suitable salts, esters and amides are, in general, those ones which donot adversely affect the herbicidal action or safening of the activeingredients.

Suitable cations are, in particular, ions of the alkali metals,preferably lithium, sodium and potassium, of the alkaline earth metals,preferably calcium and magnesium, and of the transition metals,preferably manganese, copper, zinc and iron, and also ammonium, it beingpossible in this case, if desired, for one to four atoms to be replacedby C₁-C₄-alkyl, hydroxy-C₁-C₄-alkyl, C₁-C₄-alkoxy-C₁-C₄-alkyl,hydroxy-C₁-C₄-alkoxy-C₁-C₄-alkyl, phenyl or benzyl, preferably ammonium,dimethylammonium, diisopropylammonium, tetramethylammonium,tetrabutylammonium, 2-(2-hydroxyeth-1-oxy)eth-1-yl ammonium,di(2-hydroxyeth-1-yl)-ammonium, trimethylbenzylammonium, furthermorephosphonium ions, sulfonium ions, preferably tri(C₁-C₄-alkyl)sulfonium,and sulfoxonium ions, preferably tri(C₁-C₄-alkyl)sulfoxonium.

Anions of suitable acid addition salts are mainly chloride, bromide,fluoride, hydrogen sulfate, sulfate, dihydrogen phos-phate, hydrogenphosphate, nitrate, hydrogen carbonate, carbo-nate, hexafluorosilicate,hexafluorophosphate, benzoate and the anions of C₁-C₄-alkanoyl acids,preferably formate, acetate, propionate and butyrate.

Suitable esters are alkly-, alkoxyalkyl-, allyl-, propargyl- andoxetan-3-yl-esters, preferably C₁-C₁₀-esters, for example methyl-,ethyl-, propyl-, isopropyl-, butyl-, isobutyl-, pentyl-,mexyl-(1-ethylhexyl) or isooctyl-(2-ethylhexyl) ester,C₁-C₄-alkoxy-ethyl-esters, for example methoxyethyl-, ethoxyethyl- orbutoxyethyl-ester, allylesters, propargylesters and oxetan-3-ylesters.

Suitable amides are “amide” itself, alkyl- and dialkyl-amides as well asanilides, preferably C₁-C₄-alkylamides, for example methyl- or ethylamide, di(C₁-C₄-alkyl)amides, for example dimethyl- or diethyl amide, oranilides, preferably anilide itself or 2-chloro-anilide.

The organic moieties mentioned for the substituents R¹ to R¹² arecollective terms for individual enumerations of the individual groupmembers. All hydrocarbon chains, i.e. all alkyl, haloalkyl, alkoxy,haloalkoxy, alkylsulfonyl, alkylamino, dialkylamino, dialkylminocarbonyland alkylsulfonylaminoalkyl moities can be staight-chain or branched.Unless indicated otherwise, halogenated substituents preferably carryone to five identical or different halogen atoms. The term “halogen”represents in each case fluorine, chlorine, bromine or iodine.

EXAMPLES OF OTHER MEANINGS ARE

-   -   C₁-C₂-alkyl: methyl and ethyl;    -   C₁-C₃-alkyl: C₁-C₂-alkyl as mentioned above, and propyl and        1-methylethyl;    -   C₁-C₄-alkyl: C₁-C_(s)-alkyl as mentioned above, and butyl,        1-methylpropyl, 2-methylpropyl and 1,1-dimethylethyl;    -   C₁-C₂-haloalkyl: a C₁-C₂-alkyl radical as mentioned above which        is partially or fully substituted by fluorine, chlorine, bromine        and/or iodine, for example chloromethyl, dichloro-methyl,        trichloromethyl, fluoromethyl, difluoromethyl, trifluoromethyl,        chlorofluoromethyl, dichlorofluoromethyl, chlorodifluoromethyl,        2-fluoroethyl, 2-chloroethyl, 2-bromo-ethyl, 2-iodoethyl,        2,2-difluoroethyl, 2,2,2-trifluoroethyl, 2-chloro-2-fluoroethyl,        2-chloro-2,2-difluoroethyl, 2,2-dichloro-2-fluoroethyl,        2,2,2-trichloroethyl and pentafluoroethyl;    -   C₁-C₃-haloalkyl: C₁-C₂-haloalkyl as mentioned above, and        2-fluoropropyl, 3-fluoropropyl, 2,2-difluoropropyl,        2,3-di-fluoropropyl, 2-chloropropyl, 3-chloropropyl,        2,3-dichloro-propyl, 2-bromopropyl, 3-bromopropyl,        3,3,3-trifluoropropyl, 3,3,3-trichloropropyl,        2,2,3,3,3-pentafluoropropyl, heptafluoropropyl,        1-(fluoromethyl)-2-fluoroethyl, 1-(chloromethyl)-2-chloroethyl        and 1-(bromomethyl)-2-bromoethyl;    -   C₁-C₄-haloalkyl: C₁-C₃-haloalkyl as mentioned above,        4-fluoro-butyl, 4-chlorobutyl, 4-bromobutyl and nonafluorobutyl;    -   C₁-C₂-alkoxy and the alkoxy moieties of        C₁-C₂-alkoxy-C₁-C₂-alkoxy and C₁-C₂-alkoxy-C₁-C₄-alkoxy: methoxy        and ethoxy;    -   C₁-C₃-alkoxy and and the alkoxy moieties of        C₁-C₂-alkoxy-C₁-C₃-alkoxy: C₁-C₂-alkoxy as mentioned above, and        propoxy and 1-ethylethoxy;    -   C₁-C₄-alkoxy and the alkoxy moieties of        C₁-C₂-alkoxy-C₁-C₄-alkoxy: C₁-C₃-alkoxy as mentioned above, and        butoxy, 1-methylpropoxy, 2-methylpropoxy and 1,1-dimethylethoxy;    -   C₁-C₂-haloalkoxy: a C₁-C₂-alkoxy radical as mentioned above        which is partially or fully substituted by fluorine, chlorine,        bromine and/or iodine, for example fluoromethoxy,        difluoromethoxy, trifluoromethoxy, chlorodifluoromethoxy,        bromodifluoromethoxy, 2-fluoroethoxy, 2-chloroethoxy,        2-bromomethoxy, 2-iodoethoxy, 2,2-difluoroethoxy,        2,2,2-trifluoroethoxy, 2-chloro-2-fluoroethoxy,        2-chloro-2,2-difluoroethoxy, 2,2-dichloro-2-fluoroethoxy,        2,2,2-trichloroethoxy, pentafluoroethoxy;    -   C₁-C4-haloalkoxy: C₁-C₂-haloalkoxy as mentioned above, and        2-fluoropropoxy, 3-fluoropropoxy, 2-chloropropoxy,        3-chloro-propoxy, 2-bromopropoxy, 3-bromopropoxy,        2,2-difluoro-propoxy, 2,3-difluoropropoxy, 2,3-dichloropropoxy,        3,3,3-trifluoropropoxy, 3,3,3-trichloropropoxy,        2,2,3,3,3-penta-fluoropropoxy, heptafluoropropoxy,        1-(fluoromethyl)-2-fluoro-ethoxy,        1-(chloromethyl)-2-chloroethoxy, 1(bromomethyl)2-bromoethoxy,        4-fluorobutoxy, 4-chlorobutoxy, 4-bromobutoxy and        nonafluorobutoxy;    -   C₁-C₂-alkylsulfonyl (C₁-C₂-alkyl-S(═O)₂—): methylsulfonyl and        ethylsulfonyl;    -   C₁-C₃-alkylsulfonyl: C₁-C₂-alkylsulfonyl as metioned above, and        propylsulfonyl and 1-methylethylsulfonyl;    -   C₁-C₄-alkylsulfonyl: C₁-C₃-alkylsulfonyl as mentioned above, and        butylsulfonyl, 1-methylpropylsulfonyl, 2-methylpropyl-sulfonyl        and 1,1-dimethylethylsulfonyl;    -   C₁-C₂-alkylamino: methylamino and ethylamino;    -   C₁-C₄-alkylamino: C₁-C₂-alkylamino as mentioned above, and        propylamino, 1-methylethylamino, butylamino,        1-methylpropyl-amino, 2-methylpropylamino and 1,1        -dimethylethylamino;    -   di(C₁-C₂-alkyl)amino: for example N,N-dimethylamino,        N-ethyl-N-methyl-amino, and N,N-diethylamino;    -   di(C₁-C₄-alkyl)amino: di(C₁-C₂-alkyl)amino as mentioned above,        and N,N-dipropylamino, N,N-di(1-methylethyl)amino,        N,N-dibutylamino, N,N-di(1-methyl-propyl)amino,        N,N-di(2-methylpropyl)amino, N,N-di(1,1-dimethylethyl)amino,        N-methyl-N-propylamino, N-methyl-N-(1-methylethyl)amino,        N-butyl-N-methyl-amino, N-methyl-N-(1-methylpropyl)amino,        N-methyl-N-(2-methylpropyl)amino,        N-(1,1-dimethylethyl)-N-methylamino, N-ethyl-N-propylamino,        N-ethyl-N-(1-methylethyl)amino, N-butyl-N-ethylamino,        N-ethyl-N-(1-methylpropyl)amino,        N-ethyl-N-(2-methylpropyl)amino,        N-ethyl-N-(1,1-dimethylethyl)amino,        N-(1-methyl-ethyl)-N-propylamino, N-butyl-N-propylamino,        N-(1-methylpropyl)-N-propylamino,        N-(2-methylpropyl)-N-propyl-amino,        N-(1,1-dimethylethyl)-N-propyl-amino,        N-butyl-N-(1-methylethyl)amino,        N-(1-methyl-ethyl)-N-(1-methylpropyl)-amino,        N-(1-methylethyl)-N-(2-methylpropyl)amino,        N-(1,1-dimethylethyl)-N-(1-methylethyl)-amino,        N-butyl-N-(1-methylpropyl)amino,        N-butyl-N-(2-methylpropyl)amino,        N-butyl-N-(1,1-dimethylethyl)amino,        N-(1-methylpropyl)-N-(2-methylpropyl)amino,        N-(1,1-dimethylethyl)-N-(1-methylpropyl)amino and        N-(1,1-dimethylethyl)-N-(2-methylpropyl)amino;    -   di(C₁-C₂-alkyl)aminocarbonyl: for example        N,N-dimethylamino-carbonyl, N-ethyl-N-methylaminocarbonyl and        N,N-diethylamino-carbonyl;    -   di(C₁-C₄-alkyl)aminocarbonyl: di(C₁-C₂-alkyl)aminocarbonyl as        mentioned above and N,N-dipropylaminocarbonyl,        N,N-di(1-methylethyl)aminocarbonyl, N,N-dibutylaminocarbonyl,        N,N-di(1-methylpropyl)aminocarbonyl,        N,N-di(2-methyl-propyl)-aminocarbonyl,        N,N-di(1,1-dimethylethyl)aminocarbonyl,        N-methyl-N-propyl-aminocarbonyl,        N-methyl-N-(1-methylethyl)-aminocarbonyl,        N-butyl-N-methylaminocarbonyl,        N-methyl-N-(1-methylpropyl)aminocarbonyl,        N-methyl-N-(2-methylpropyl)-aminocarbonyl,        N-(1,1-dimethylethyl)-N-methylaminocarbonyl,        N-ethyl-N-propylaminocarbonyl,        N-ethyl-N-(1-methylethyl)-aminocarbonyl,        N-butyl-N-ethylaminocarbonyl,        N-ethyl-N-(1-methylpropyl)aminocarbonyl,        N-ethyl-N-(2-methylpropyl)-aminocarbonyl,        N-ethyl-N-(1,1-dimethylethyl)aminocarbonyl,        N-(1-methylethyl)-N-propylaminocarbonyl,        N-butyl-N-propylamino-carbonyl,        N-(1-methylpropyl)-N-propylaminocarbonyl,        N-(2-methylpropyl)-N-propylamino-carbonyl,        N-(1,1-dimethylethyl)-N-propylaminocarbonyl,        N-butyl-N-(1-methyl-ethyl)aminocarbonyl,        N-(1-methylethyl)-N-(1-methylpropyl)aminocarbonyl,        N-(1-methylethyl)-N-(2-methylpropyl)aminocarbonyl,        N-(1,1-dimethylethyl)-N-(1-methylethyl)aminocarbonyl,        N-butyl-N-(1-methylpropyl)aminocarbonyl,        N-butyl-N-(2-methylpropyl)amino-carbonyl,        N-butyl-N-(1,1-dimethylethyl)aminocarbonyl,        N-(1-methylpropyl)-N-(2-methylpropyl)aminocarbonyl,        N-(1,1-dimethylethyl)-N-(1-methylpropyl)aminocarbonyl and        N-(1,1-dimethylethyl)-N-(2-methylpropyl)-aminocarbonyl;    -   C₁-C₂-alkylsulfonylamino-C₁-C₂-alkyl: C₁-C₂-alkyl which is        substituted by C₁-C₂-alkylsulfonylamino as mentioned above, for        example methylsulfonylaminomethyl, ethylsulfonylaminomethyl,        2-methylsulfonylaminoethyl and 2-ethylsulfonylamino-ethyl;    -   C₁-C₄-alkylsulfonylamino-C₁-C₄-alkyl:        C₁-C₂-alkylsulfonylamino-C₁-C₂-alkyl as mentioned above, and        propylsulfonylaminomethyl, (1-methylethylsulfonyl-amino)methyl,        butylsulfonylaminomethyl, (1-methylpropyl-sulfonylamino)methyl,        (2-methylpropyl-sulfonylamino)methyl,        (1,1-dimethylethylsulfonylamino)-methyl,        2-(propylsulfonylamino)ethyl,        2-(1-methylethyl-sulfonylamino)ethyl,        2-(butyl-sulfonylamino)ethyl,        2-(1-methylpropylsulfonylamino)ethyl,        2-(2-methylpropyl-sulfonylamino)ethyl,        2-(1,1-dimethylethylsulfonylamino)ethyl,        2-(methylsulfonyl-amino)propyl, 3-(methylsulfonylamino)propyl,        2-(ethylsulfonylamino)propyl, 3-(ethylsulfonylamino)propyl,        3-(propylsulfonylamino)propyl, 3-(butylsulfonyl-amino)propyl,        4-(methylsulfonylamino)butyl, 4-(ethylsulfonylamino)butyl,        4-(propylsulfonylamino)butyl and 4-(butylsulfonylamino)butyl.

The compounds of components A), B) and, if desired C) as well as theirsalts, esters and amides, also may exist in the form of the pureenantiomere, and also as racemates or diastereomer mixtures.

Preferred with regard to the synergistic herbicidal action of themixturs according to the invention are those sulfonylureas of formula 11wherein the variables have the following meanings, either alone or incombination:

-   -   R¹ is hydrogen; or C₁-C₃-alkyl, especially methyl or ethyl,        preferably methyl;    -   R² is halogen, especially fluorine or chlorine, especially        chlorine; C₁-C₃-alkyl, especially methyl or ethyl, preferably        methyl; C₁-C₂-haloalkyl, especially difluoromethyl or        trifluoromethyl, preferably trifluoromethyl; C₁-C₃-alkoxy,        especially methoxy or ethoxy, preferably methoxy;        C₁-C₂-haloalkoxy, especially difluoromethoxy or        trifluoromethoxy, preferably difluoromethoxy; C₁-C₂-alkylamino,        especially methylamino; or di(C₁-C₂-alkyl)amino, especially        dimethylamino or diethylamino, preferably dimethylamino;    -   R³ is C₁-C₃-alkyl, especially methyl or ethyl, preferably        methyl; C₁-C₃-alkoxy, especially methoxy or ethoxy; or        C₁-C₂-haloalkoxy especially difluoromethoxy, trifluoromethoxy or        2,2,2-trifluoroethoxy, preferably difluoromethoxy or        2,2,2-trifluoroethoxy;    -   R⁴ is halogen, preferably fluorine, chlorine or bromine,        especially chlorine; C₁-C₃-haloalkyl, especially difluoromethyl,        trifluoromethyl, 2,2,2-trifluoroethyl or 3,3,3-trifluoropropyl,        preferably trifluoromethyl or 3,3,3-trifluoropropyl;        C₁-C₃-alkoxy, especially methoxy or ethoxy, preferably ethoxy;        C₁-C₂-haloalkoxy, especially difluoromethoxy, 2-fluoroethoxy,        2-chloroethoxy, 2,2-difluoroethoxy or 2,2,2-trifluoroethoxy,        preferably 2-chloroethoxy or 2,2,2-trifluoro-ethoxy;        C₁-C₂-alkoxy-C₁-C₂-alkoxy, especially 2-methoxyethoxy or        2-ethoxyethoxy, preferably 2-methoxyethoxy; cyclopropylcarbonyl;        di(C₁-C₂-alkyl)aminocarbonyl, epecially dimethylaminocarbonyl or        diethylaminocarbonyl, preferably dimethylaminocarbonyl; or        hydroxycarbonyl;    -   especially is halogen, preferably fluorine, chlorine or bromine,        especially chlorine; C₁-C₃-haloalkyl, especially difluoromethyl,        trifluoromethyl, 2,2,2-trifluoroethyl or 3,3,3-trifluoropropyl,        preferably trifluoromethyl or 3,3,3-trifluoropropyl;        C₁-C₃-alkoxy, especially methoxy or ethoxy, preferably ethoxy;        C₁-C₂-haloalkoxy, especially difluoromethoxy, 2-fluoroethoxy,        2-chloroethoxy, 2,2-difluoroethoxy or 2,2,2-tri-fluoroethoxy,        preferably 2-chloroethoxy or 2,2,2-trifluoroethoxy;        cyclopropylcarbonyl; di(C₁-C₂-alkyl)aminocarbonyl, epecially        dimethyl-aminocarbonyl or diethylaminocarbonyl, preferably        dimethylaminocarbonyl; or hydroxycarbonyl;    -   R⁵ is hydrogen; halogen, especially chlorine, bromine or iodine,        preferably iodine; or C₁-C₂-alkylsulfonylamino-C₁-C₂-alkyl,        especially methylsulfonyaminomethyl or ethylsuffonylaminomethyl,        preferably methylsulfonyaminomethyl; especially is hydrogen;    -   R⁶ is hydroxycarbonyl; or C₁-C₃-alkylsulfonyl, especially        methylsulfonyl or ethylsulfonyl, preferably ethylsulfonyl;    -   R⁷ is hydrogen; or C₁-C₂-haloalkyl, especially diflouromethyl or        trifluoromethyl, preferably trifluoromethyl;    -   R⁸ is hydroxycarbonyl;    -   R⁹ is 2-methyl-tetrazol-5-yl or hydroxycarbonyl;    -   R¹⁰ is hydrogen; or halogen, especially fluorine, chlorine or        bromine, preferably chlorine;    -   R¹¹ is C₁-C₃-alkyl, especially methyl or ethyl, preferably        methyl;    -   R¹² is halogen, especially chlorine or bromine, preferably        chlorine; or C₁-C₃-alkylsulfonyl, especially methylsulfonyl or        ethylsulfonyl, preferably ethylsulfonyl;

or one of its environmentally compatible salts or esters, especiallyC₁-C₃-alkyl or oxetan-3-yl ester, preferably methyl-, ethyl oroxetan-3-yl ester;

Especially preferred are sulfonylureas of formula II wherein

-   -   A is A1, wherein        -   R⁴ is halogen, preferably chlorine; C₁-C₃-haloalkyl,            preferably trifluoromethyl or 3,3,3-trifluoropropyl;            C₁-C₂7alkoxy, preferably ethoxy; C₁-C₂-haloalkoxy,            preferably 2-chloroethoxy or 2,2,2-trifluoroethoxy;            C₁-C₂-alkoxy-C₁-C₂-alkoxy, preferably 2-methoxyethoxy;            cyclopropylcarbonyl; di(C₁-C₂-alkyl)amino-carbonyl,            preferably dimethylaminocarbonyl; hydroxycarbonyl or            methoxy-carbonyl, ethoxycarbonyl or oxetan-3-yloxycarbonyl;        -   R⁵ is hydrogen; halogen, preferably iodine; or            C₁-C₂-alkylsulfonylamino-C₁-C₂-alkyl, preferably            methylsulfonylaminomethyl;    -   B is —O—, —NH—, —CH₂— or a bond;    -   R¹ is hydrogen; or C₁-C₂-alkyl, especially methyl;    -   R² is halogen, preferably chlorine; C₁-C₂-alkyl, preferably        methyl; C₁-C₂-haloalkyl, preferably trifluoromethyl;        C₁-C₂-alkoxy; preferably methoxy; C₁-C₂-haloalkoxy, preferably        difluoromethoxy; C₁-C₂-alkylamino, especially methylamino; or        di(C₁-C₂-alkyl)-amino, preferably dimethylamino;    -   R³ is C₁-C₂-alkyl, preferably methyl; C₁-C₃-alkoxy, especially        methoxy or ethoxy; or C₁-C₂-haloalkoxy, preferably        difluoromethoxy or 2,2,2-trifluoroethoxy;    -   X is CH or N;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are bensulfuron, especially        bensulfuron methyl, chlorimuron, especially chlorimuron ethyl,        chlorsulfuron, cinosulfuron, cyclosulfamuron, ethametsulfuron,        especially ethametsulfuron methyl, ethoxysulfuron,        flazasulfuron, iodosulfuron, especially iodosulfuron methyl,        mesosulfuron, especially mesosulfuron methyl, metsulfuron,        especially metsulfuron methyl, nicosulfuron, primisulfuron,        especially primisulfuron methyl, prosulfuron, sulfometuron,        especially sulfometuron methyl or oxasulfuron, triasulfuron,        tribenuron, especially tribenuron methyl, triflusulfuron,        especially triflusulfuron methyl, trifloxysulfuron or        tritosulfuron; or their environmentally compatible salts;        -   Particularly preferred are chlorsulfuron, iodosulfuron,            especially iodosulfuron methyl, mesosulfuron, especially            mesosulfuron methyl, metsulfuron, especially metsulfuron            methyl, prosulfuron, triasulfuron, tribenuron, especially            tribenuron methyl, or tritosulfuron; or their            environmentally compatible salts;

Extraordinary preferred is tritosulfuron or its environmentallycompatible salts.

Also especially preferred are sulfonylureas of formula II wherein

-   -   A is A1, wherein        -   R⁴ is halogen, preferably chlorine; C₁-C₃-haloalkyl,            preferably trifluoromethyl or 3,3,3-trifluoropropyl;            C₁-C₂-alkoxy, preferably ethoxy; C₁-C₂-haloalkoxy,            preferably 2-chloroethoxy or 2,2,2-trifluoroethoxy;            cyclopropylcarbonyl; di(C₁-C₂-alkyl)amino-carbonyl,            preferably dimethylaminocarbonyl; hydroxy-carbonyl or            methoxy-carbonyl, ethoxycarbonyl or oxetan-3-yloxycarbonyl;        -   R⁵ is hydrogen;    -   B is —O—, —NH—, —CH₂— or a bond; preferably a bond;    -   R¹ is hydrogen; or C₁-C₂-alkyl, especially methyl;    -   R² is halogen, preferably chlorine; C₁-C₂-alkyl, preferably        methyl; C₁-C₂-haloalkyl, preferably trifluoromethyl;        C₁-C₂-alkoxy, preferably methoxy; C₁-C₂-haloalkoxy, preferably        difluoromethoxy; C₁-C₂-alkylamino, especially methylamino; or        di(C₁-C₂-alkyl)-amino, preferably dimethylamino;    -   R³ is C₁-C₂-alkyl, preferably methyl; C₁-C₃-alkoxy, especially        methoxy or ethoxy; or C₁-C₂-haloalkoxy, preferably        difluoromethoxy or 2,2,2-trifluoroethoxy;    -   X is CH or N;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are bensulfuron, especially        bensulfuron methyl, chlorimuron, especially chlorimuron ethyl,        chlorsulfuron, cyclosulfamuron, ethametsulfuron, especially        ethametsulfuron methyl, ethoxysulfuron, flazasulfuron,        metsulfuron, especially metsulfuron methyl, nicosulfuron,        primisulfuron, especially primisulfuron methyl, prosulfuron,        sulfometuron, especially sulfometuron methyl or oxasulfuron,        triasulfuron, tribenuron, especially tribenuron methyl,        triflusulfuron, especially triflusulfuron methyl,        trifloxysulfuron or tritosulfuron; or their environmentally        compatible salts;    -   Particularly preferred are chlorsulfuron, metsulfuron,        especially metsulfuron methyl, prosulfuron, triasulfuron,        tribenuron, especially tribenuron methyl, or tritosulfuron; or        their environmentally compatible salts;        -   Also particularly preferred are bensulfuron, especially            bensulfuron methyl, chlorimuron, especially chlorimuron            ethyl, chlorsulfuron, cyclosulfamuron, ethametsulfuron,            especially ethametsulfuron methyl, ethoxysulfuron,            flazasulfuron, nicosulfuron, primisulfuron, especially            primisulfuron methyl, prosulfuron, sulfometuron, especially            sulfometuron methyl or oxasulfuron, triasulfuron or            triflusulfuron, especially triflusulfuron methyl, or their            environmentally compatible salts;            -   Extraordinary preferred are chlorsulfuron, prosulfuron                or triasulfuron or their environmentally compatible                salts;

Also especially preferred are sulfonylureas of formula II wherein

-   -   A is A2, wherein        -   R⁶ is C₁-C₂alkylsulfonyl, preferably ethylsulfonyl;            hydroxycarbonyl or methoxycarbonyl;        -   R⁷ is hydrogen or C₁-C₂-haloalkyl, preferably            trifluoromethyl;    -   B is a bond;    -   R¹ is hydrogen;    -   R² is C₁-C₂-alkoxy, preferably methoxy;    -   R³ is C₁-C₂-alkoxy, especially methoxy;    -   X is CH;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are flupyrsulfuron, especially        flupyrsulfuron methyl, or rimsulfuron; or their environmentally        compatible salts;        -   Particularly preferred is flupyrsulfuron, especially            flupyrsulfuron methyl,or its environmentally compatible            salts.

Also especially preferred are sulfonylureas of formula 11 wherein

-   -   A is A2, wherein        -   R⁶ is C₁-C₂-alkylsulfonyl, preferably ethylsulfonyl;            hydroxycarbonyl or methoxycarbonyl;        -   R⁷ is hydrogen;    -   B is a bond;    -   R¹ is hydrogen;    -   R² is C₁-C₂-alkoxy, preferably methoxy;    -   R³ is C₁-C₂-alkoxy, especially methoxy;    -   X is CH;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are rimsulfuron; or its        environmentally compatible salts;

Also especially preferred are sulfonylureas of formula 11 wherein

-   -   A is A3, wherein        -   R⁸ is hydroxycarbonyl or methoxycarbonyl;    -   B is a bond;    -   R¹ is hydrogen;    -   R² is C₁-C₂-alkyl, preferably methyl;    -   R³ is C₁-C₂-alkoxy, especially methoxy;    -   X is CH;

or one of its environmentally compatible salts;

-   -   An example for these sulfonylureas is thifensulfuron, especially        thifensulfuron methyl; or its environmentally compatible salts;

Also especially preferred are sulfonylureas of formula II wherein

-   -   A is A4, wherein        -   R⁹ is 2-methyl-tetrazol-5-yl, hydroxycarbonyl,            methoxycarbonyl or ethoxycarbony;        -   R¹⁰ is hydrogen; or halogen, preferably chlorine;        -   R¹¹ is C₁-C₂-alkyl, preferably methyl;    -   B is a bond;    -   R¹ is hydrogen;    -   R² is C₁-C₂-alkoxy, preferably methoxy;    -   R³ is C₁-C₂-alkoxy, preferably methoxy;    -   X is CH;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are azimsulfuron, halosulfuron,        especially halosulfuron methyl, or pyrazosulfuron, especially        pyrazosulfuron ethyl; or their environmentally compatible salts;

Also especially preferred are sulfonylureas of formula II wherein

-   -   A is A5, wherein        -   R¹² is halogen, preferably chlorine; or C₁-C₂-alkylsulfonyl,            preferably ethylsulfonyl;    -   B is a bond;    -   R¹ is hydrogen;    -   R² is C₁-C₂-alkoxy, preferably methoxy;    -   R³ is C₁-C₂-alkoxy, especially methoxy;    -   X is CH;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are imazosulfuron or        sulfosulfuron; or their environmentally compatible salts;        -   Particularly preferred is sulfosulfuron,or its            environmentally compatible salts.

Also especially preferred are sulfonylureas of formula II wherein

-   -   A is A5, wherein        -   R¹² is halogen;    -   B is a bond;    -   R¹ is hydrogen;    -   R² is C₁-C₂-alkoxy, preferably methoxy;    -   R³ is C₁-C₂-alkoxy, especially methoxy;    -   X is CH;

or one of its environmentally compatible salts;

-   -   Examples for these sulfonylureas are imazosulfuron or its        environmentally compatible salts;

If desired, the synergistic mixtures according to the invention compriseas component C) a safener as mentioned at the outset.

Preferred compounds of the component C) are cloquintocet, preferablycloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x nhydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl.

Preferred synergistic mixtures according to the invention comprise ascomponent A) picolinafen and as component B) bensulfuron, especiallybensulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) bensulfuron, especially bensulfuron methyl,and as component C) cloquintocet, preferably cloquintocet “acid”,cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) bensulfuron,        especially bensulfuron methyl, and as component C) cloquintocet,        preferably cloquintocet “acid”, cloquintocet mexyl or        cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        bensulfuron, especially bensulfuron methyl, and as component C)        isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        bensulfuron, especially bensulfuron methyl, and as component C)        mefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) chlorimuron, especially chlorimuronethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) chlorimuron, especially chlorimuron ethyl,and as component C) cloquintocet, preferably cloquintocet “acid”,cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) chlorimuron,        especially chlorimuron ethyl, and as component C) cloquintocet,        preferably cloquintocet “acid”, cloquintocet mexyl or        cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        chlorimuron, especially chlorimuron ethyl, and as component C)        isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        chlorimuron, especially chlorimuron ethyl, and as component C)        mefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) chlorsulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) chlorsulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) chlorsulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        chlorsulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        chlorsulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) cinosulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) cinosulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) cinosulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2to6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        cinosulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        cinosulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) cyclosulfamuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) cyclosulfamuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) cyclosulfamuron, and        as component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        cyclosulfamuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        cyclosulfamuron, and as component C) mefenpyr, preferably        mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) ethametsulfuron, especiallyethametsulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) ethametsulfuron, especially ethametsulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) ethametsulfuron,        especially ethametsulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        ethametsulfuron, especially ethametsulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        ethametsulfuron, especially ethametsulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) ethoxysulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) ethoxysulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) ethoxysulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        ethoxysulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        ethoxysulfuron, and as component C) mefenpyr, preferably        mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) flazasulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) flazasulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) flazasulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        flazasulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        flazasulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) iodosulfuron, especially iodosulfuronmethyl,.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) iodosulfuron, especially iodosulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=.2 to6); isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) iodosulfuron,        especially iodosulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        iodosulfuron, especially iodosulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        iodosulfuron, especially iodosulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) mesosulfuron, especially mesosulfuronmethyl,.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) mesosulfuron, especially mesosulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) mesosulfuron,        especially mesosulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        mesosulfuron, especially mesosulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        mesosulfuron, especially mesosulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) metsulfuron, especially metsulfuronmethyl,.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) metsulfuron, especially metsulfuron methyl,and as component C) cloquintocet, preferably cloquintocet “acid”,cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) metsulfuron,        especially metsulfuron methyl, and as component C) cloquintocet,        preferably cloquintocet “acid”, cloquintocet mexyl or        cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        metsulfuron, especially metsulfuron methyl, and as component C)        isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        metsulfuron, especially metsulfuron methyl, and as component C)        mefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) nicosulfuron. Also preferred aresynergistic mixtures which comprise as component A) picolinafen, ascomponent B) nicosulfuron, and as component C) cloquintocet, preferablycloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x nhydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) nicosulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2to6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        nicosulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B        nicosulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) primisulfuron, especially primisulfuronmethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) primisulfuron, especially primisulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) primisulfuron,        especially primisulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        primisulfuron, especially primisulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        primisulfuron, especially primisulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) prosulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) prosulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid“or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) prosulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        prosulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        prosulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) sulfometuron, especially sulfometuronmethyl or oxasulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) sulfometuron, especially sulfometuronmethyl or oxasulfuron, and as component C) cloquintocet, preferablycloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x nhydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) sulfometuron,        especially sulfometuron methyl or oxasulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        sulfometuron, especially sulfometuron methyl or oxasulfuron, and        as component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        sulfometuron, especially sulfometuron methyl or oxasulfuron, and        as component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) triasulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) triasulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid“or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) triasulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        triasulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        triasulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) tribenuron, especially tribenuronmethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) tribenuron, especially tribenuron methyl,and as component C) cloquintocet, preferably cloquintocet “acid”,cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) tribenuron, especially        tribenuron methyl, and as component C) cloquintocet, preferably        cloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x        n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        tribenuron, especially tribenuron methyl, and as component C)        isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        tribenuron, especially tribenuron methyl, and as component C)        mefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) triflusulfuron, especiallytriflusulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) triflusulfuron, especially triflusulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) triflusulfuron,        especially triflusulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        triflusulfuron, especially triflusulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        triflusulfuron, especially triflusulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) trifloxysulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) trifloxysulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) trifloxysulfuron, and        as component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2to6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        trifloxysulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        trifloxysulfuron, and as component C) mefenpyr, preferably        mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) tritosulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) tritosulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) tritosulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        tritosulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        tritosulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) flupyrsulfuron, especiallyflupyrsulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) flupyrsulfuron, especially flupyrsulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) flupyrsulfuron,        especially flupyrsulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        flupyrsulfuron, especially flupyrsulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        flupyrsulfuron, especially flupyrsulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) rimsulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) rimsulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) rimsulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        rimsulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        rimsulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) thifensulfuron, especiallythifensulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) thifensulfuron, especially thifensulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) thifensulfuron,        especially thifensulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        thifensulfuron, especially thifensulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        thifensulfuron, especially thifensulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) azimsulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) azimsulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) azimsulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        azimsulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        azimsulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) halosulfuron, especially halosulfuronmethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) halosulfuron, especially halosulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) halosulfuron,        especially halosulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        halosulfuron, especially halosulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        halosulfuron, especially halosulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) pyrazosulfuron, especiallypyrazosulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) pyrazosulfuron, especially pyrazosulfuronmethyl, and as component C) cloquintocet, preferably cloquintocet“acid”, cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6);isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl; ormefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) pyrazosulfuron,        especially pyrazosulfuron methyl, and as component C)        cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl        or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        pyrazosulfuron, especially pyrazosulfuron methyl, and as        component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        pyrazosulfuron, especially pyrazosulfuron methyl, and as        component C) mefenpyr, preferably mefenpyr “acid” or mefenpyr        diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) imazosulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) imazosulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) imazosulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        imazosulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        imazosulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) sulfosulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) sulfosulfuron, and as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) sulfosulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        sulfosulfuron, and as component C) isoxadifen, preferably        isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        sulfosulfuron, and as component C) mefenpyr, preferably mefenpyr        “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) mesosulfuron, especially mesosulfuronmethyl, and iodosulfuron, especially iodosulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) mesosulfuron, especially mesosulfuronmethyl, and iodosulfuron, especially iodosulfuron methyl, and ascomponent C) cloquintocet, preferably cloquintocet “acid”, cloquintocetmexyl or cloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen,preferably isoxadifen “acid” or isoxadifen ethyl; or mefenpyr,preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) mesosulfuron,        especially mesosulfuron methyl, and iodosulfuron, especially        iodosulfuron methyl, and as component C) cloquintocet,        preferably cloquintocet “acid”, cloquintocet mexyl or        cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        mesosulfuron, especially mesosulfuron methyl, and iodosulfuron,        especially iodosulfuron methyl, and as component C) isoxadifen,        preferably isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) picolinafen, as component B)        mesosulfuron, especially mesosulfuron methyl, and iodosulfuron,        especially iodosulfuron methyl, and as component C) mefenpyr,        preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) flupyrsulfuron, especiallyflupyrsulfuron methyl, and metsulfuron, especially metsulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) flupyrsulfuron, especially flupyrsulfuronmethyl, and metsulfuron, especially metsulfuron methyl, and as componentC) cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) flupyrsulfuron,        especially flupyrsulfuron methyl, and metsulfuron, especially        metsulfuron methyl, and as component C) cloquintocet, preferably        cloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x        n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) flupyrsulfuron, especially        flupyrsulfuron methyl, and metsulfuron, especially metsulfuron        methyl, and as component C) isoxadifen, preferably isoxadifen        “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) flupyrsulfuron, especially        flupyrsulfuron methyl, and metsulfuron, especially metsulfuron        methyl and as component C) mefenpyr, preferably mefenpyr “acid”        or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) flupyrsulfuron, especiallyflupyrsulfuron methyl, and thifensulfuron, especially thifensulfuronmethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) flupyrsulfuron, especially flupyrsulfuronmethyl, and thifensulfuron, especially thifensulfuron methyl, and ascomponent C) cloquintocet, preferably cloquintocet “acid”, cloquintocetmexyl or cloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen,preferably isoxadifen “acid” or isoxadifen ethyl; or mefenpyr,preferably mefenpyr “acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) flupyrsulfuron,        especially flupyrsulfuron methyl, and thifensulfuron, especially        thifensulfuron methyl, and as component C) cloquintocet,        preferably cloquintocet “acid”, cloquintocet mexyl or        cloquintocet mexyl x n hydrate (n=2to6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) flupyrsulfuron, especially        flupyrsulfuron methyl, and thifensulfuron, especially        thifensulfuron methyl, and as component C) isoxadifen,        preferably isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) flupyrsulfuron, especially        flupyrsulfuron methyl, and thifensulfuron, especially        thifensulfuron methyl, and as component C) mefenpyr, preferably        mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) flupyrsulfuron, especiallyflupyrsulfuron methyl, and chlorsulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) flupyrsulfuron, especially flupyrsulfuronmethyl, and chlorsulfuron, and as component C) cloquintocet, preferablycloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x nhydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) flupyrsulfuron,        especially flupyrsulfuron methyl, and chlorsulfuron and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) flupyrsulfuron, especially        flupyrsulfuron methyl, and chlorsulfuron and as component C)        isoxadifen, preferably isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) flupyrsulfuron, especially        flupyrsulfuron methyl, and chlorsulfuron, and as component C)        mefenpyr, preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) metsulfuron, especially metsulfuronmethyl, and thifensulfuron, especially thifensulfuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) metsulfuron, especially metsulfuron methyl,and thifensulfuron, especially thifensulfuron methyl, and as componentC) cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) metsulfuron,        especially metsulfuron methyl, and thifensulfuron, especially        thifensulfuron methyl and as component C) cloquintocet,        preferably cloquintocet “acid”, cloquintocet mexyl or        cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) metsulfuron, especially metsulfuron        methyl, and thifensulfuron, especially thifensulfuron methyl,        and as component C) isoxadifen, preferably isoxadifen “acid” or        isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) metsulfuron, especially metsulfuron        methyl, and thifensulfuron, especially thifensulfuron methyl,        and as component C) mefenpyr, preferably mefenpyr “acid” or        mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) metsulfuron, especially metsulfuronmethyl, and chlorsulfuron.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) metsulfuron, especially metsulfuron methyl,and chlorsulfuron, and as component C) cloquintocet, preferablycloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x nhydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) metsulfuron,        especially metsulfuron methyl, and chlorsulfuron, and as        component C) cloquintocet, preferably cloquintocet “acid”,        cloquintocet mexyl or cloquintocet mexyl x n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) metsulfuron, especially metsulfuron        methyl, and chlorsulfuron, and as component C) isoxadifen,        preferably isoxadifen “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) metsulfuron, especially metsulfuron        methyl, and chlorsulfuron, and as component C) mefenpyr,        preferably mefenpyr “acid” or mefenpyr diethyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen and as component B) thifensulfuron, especiallythifensulfuron methyl, and tribenuron, especially tribenuron methyl.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) thifensulfuron, especially thifensulfuronmethyl, and tribenuron, especially tribenuron methyl, and as componentC) cloquintocet, preferably cloquintocet “acid”, cloquintocet mexcyl orcloquintocet mexcyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl.

-   -   Especially preferred are synergistic mixtures which comprise as        component A) picolinafen, as component B) thifensulfuron,        especially thifensulfuron methyl, and tribenuron, especially        tribenuron methyl, and as component C) cloquintocet, preferably        cloquintocet “acid”, cloquintocet mexyl or cloquintocet mexyl x        n hydrate (n=2 to 6).    -   Also especially preferred are synergistic mixtures which        comprise as component A) thifensulfuron, especially        thifensulfuron methyl, and tribenuron, especially tribenuron        methyl, and as component C) isoxadifen, preferably isoxadifen        “acid” or isoxadifen ethyl.    -   Also especially preferred are synergistic mixtures which        comprise as component A) thifensulfuron, especially        thifensulfuron methyl, and tribenuron, especially tribenuron        methyl, and as component C) mefenpyr, preferably mefenpyr “acid”        or mefenpyr diethyl.

Moreover it may be advantageous that the synergistic mixture accordingto the present invention comprises as active ingredients a compound ofgroup A), at least a compound of group B), if desired at least acompound of group C), and furthermore at least a herbicide of group D).

Examples of suitable herbicides of group D) are, inter alia, acetyl-CoAcarboxylase inhibitors (ACC), acetolactate synthase inhibitors (ALS),amides, auxin herbicides, auxin transport inhibitors, carotenoidbiosynthesis inhibitors, enolpyruvylshikimate 3-phosphate synthaseinhibitors (EPSPS), glutamine synthetase inhibitors, lipid biosynthesisinhibitors, mitosis inhibitors, protoporphyrinogen IX oxidaseinhibitors, photosynthesis inhibitors, synergists, growth substances,cell wall biosynthesis inhibitors and a variety of other herbicides.

Special examples of herbicides of group D) which can be used, are interalia,

D1 acetyl-CoA carboxylase inhibitors (ACC), for example

-   -   cyclohexenone oxime ethers, such as alloxydim, clethodim,        cloproxydim, cycloxydim, sethoxydim, tralkoxydim, butroxydim,        clefoxydim or tepraloxydim;    -   phenoxyphenoxypropionic esters, such as clodinafop-propargyl,        cyhalofop-butyl, diclofop-methyl, fenoxaprop-ethyl,        fenoxaprop-P-ethyl, fenthiapropethyl, fluazifop-butyl,        fluazifop-P-butyl, haloxyfop-ethoxyethyl, haloxyfop-methyl,        haloxyfop-P-methyl, isoxapyrifop, propaquizafop,        quizalofop-ethyl, quizalofop-P-ethyl or quizalofop-tefuryl; or    -   arylaminopropionic acids, such as flamprop-methyl or        flamprop-isopropyl;

D2 acetolactate synthase inhibitors (ALS), for example

-   -   imidazolinones, such as imazapyr, imazaquin,        imazamethabenz-methyl (imazame), imazamox, imazapic or        imazethapyr;    -   pyrimidyl ethers, such as pyrithiobac-acid, pyrithiobac-sodium,        bispyribac-sodium, KIH-6127 or pyribenzoxym;    -   sulfonamides, such as cloransulam, diclosulam, florasulam,        flumetsulam, metosulam or penoxsulam; or    -   flucarbazone or propoxycarbazone;

D3 amides, for example

-   -   allidochlor (CDAA), benzoylprop-ethyl, bromobutide,        chlorthiamid, diphenamid, etobenzanid (benzchlomet),        fluthiamide, fosamin or monalide;

D4 auxin herbicides, for example

-   -   pyridinecarboxylic acids, such as clopyralid or picloram; or    -   2,4-D or benazolin;

D5 auxin transport inhibitors, for example

-   -   naptalame or diflufenzopyr;

D6 carotenoid biosynthesis inhibitors, for example

-   -   benzofenap, clomazone (dimethazone), diflufenican,        fluorochloridone, fluridone, pyrazolynate, pyrazoxyfen,        isoxaflutole, isoxachlortole, mesotrione, sulcotrione        (chlormesulone), ketospiradox, flurtamone, norflurazon or        amitrol;

D7 enolpyruvylshikimate-3-phosphate synthase inhibitors (EPSPS), forexample

-   -   glyphosate or sulfosate;

D8 glutamine synthetase inhibitors, for example

-   -   bilanafos (bialaphos) or glufosinate-ammonium;

D9 lipid biosynthesis inhibitors, for example

-   -   anilides, such as anilofos or mefenacet;    -   chloroacetanilides, such as dimethenamid, S-dimethen-amid,        acetochlor, alachlor, butachlor, butenachlor, diethatyl-ethyl,        dimethachlor, metazachlor, metolachlor, S-metolachlor,        pretilachlor, propachlor, prynachlor, terbuchlor, thenylchlor or        xylachlor;    -   thioureas, such as butylate, cycloate, di-allate, dimepiperate,        EPTC, esprocarb, molinate, pebulate, prosulfocarb, thiobencarb        (benthiocarb), tri-allate or vernolate; or    -   benfuresate or perfluidone;

D10 mitosis inhibitors; for example

-   -   carbamates, such as asulam, carbetamid, chlorpropham, orbencarb,        pronamid (propyzamid), propham or tiocarbazil;    -   dinitroanilines, such as benefin, butralin, dinitramin,        ethalfluralin, fluchloralin, oryzalin, pendimethalin, prodiamine        or trifluralin;    -   pyridines, such as dithiopyr or thiazopyr; or    -   butamifos, chlorthal-dimethyl (DCPA) or maleic hydrazide;

D11 protoporphyrinogen IX oxidase inhibitors, for example

-   -   diphenyl ethers, such as acifluorfen, acifluorfen-sodium,        aclonifen, bifenox, chlomitrofen (CNP), ethoxyfen, fluorodifen,        fluoroglycofen-ethyl, fomesafen, furyloxyfen, lactofen,        nitrofen, nitrofluorfen or oxyfluorfen;    -   oxadiazoles, such as oxadiargyl or oxadiazon;    -   cyclic imides, such as azafenidin, butafenacil,        carfentrazone-ethyl, cinidon-ethyl, flumiclorac-pentyl,        flumioxazin, flumipropyn, flupropacil, fluthiacet-methyl,        sulfentrazone or thidiazimin; or    -   pyrazoles, such as ET-751, JV 485 or nipyraclofen;

D12 photosynthesis inhibitors, for example

-   -   propanil, pyridate or pyridafol;    -   benzothiadiazinones, such as bentazone;    -   dinitrophenols, for example bromofenoxim, dinoseb,        dinoseb-acetate, dinoterb or DNOC;    -   dipyridylenes, such as cyperquat-chloride,        difenzoquat-methylsulfate, diquat or paraquat-dichloride;    -   ureas, such as chlorbromuron, chlorotoluron, difenoxuron,        dimefuron, diuron, ethidimuron, fenuron, fluometuron,        isoproturon, isouron, linuron, methabenzthiazuron, methazole,        metobenzuron, metoxuron, monolinuron, neburon, siduron or        tebuthiuron;    -   phenols, such as bromoxynil or ioxynil;    -   chloridazon;    -   triazines, such as ametryn, atrazine, cyanazine, desmetryn,        dimethamethryn, hexazinone, prometon, prometryn, propazine,        simazine, simetryn, terbumeton, terbutryn, terbutylazine or        trietazine;    -   triazinones, such as metamitron or metribuzin;    -   uracils, such as bromacil, lenacil or terbacil; or    -   biscarbamates, such as desmedipham or phenmedipham;

D13 synergists, for example

-   -   oxiranes, such as tridiphane;

D14 growth substances, for example

-   -   aryloxyalkanoic acids, such as 2,4-DB, clomeprop, dichlorprop,        dichlorprop-P (2,4-DP-P), fluoroxypyr, MCPA, MCPB, mecoprop,        mecoprop-P or triclopyr;    -   benzoic acids, such as chloramben or dicamba; or    -   quinolinecarboxylic acids, such as quinclorac or quinmerac;

D15 cell wall synthesis inhibitors, for example

-   -   isoxaben or dichlobenil;

D16 various other herbicides, for example.

-   -   dichloropropionic acids, such as dalapon;    -   dihydrobenzofurans, such as ethofumesate;    -   phenylacetic acids, such as chlorfenac (fenac); or    -   aziprotryn, barban, bensulide, benzthiazuron, benzo-fluor,        buminafos, buthidazole, buturon, cafenstrole, chlorbufam,        chlorfenprop-methyl, chloroxuron, cinmethylin, cumyluron,        cycluron, cyprazine, cyprazole, dibenzyluron, dipropetryn,        dymron, eglinazin-ethyl, endothall, ethiozin, flucabazone,        fluorbentranil, flupoxam, isocarbamid, isopropalin, karbutilate,        mefluidide, monuron, napropamide, napropanilide, nitralin,        oxaciclomefone, phenisopham, piperophos, procyazine,        profluralin, pyributicarb, secbumeton, sulfallate (CDEC),        terbucarb, triaziflam, triazofenamid or trimeturon;

or their environmentally compatible salts, “acids”, esters and amides.

Suitable salts, esters and amides are similar to those mentioned for thecompounds of groups A), B) and C).

The compounds of group D) as well as their salts, “acids”, esters andamides, may also exist in the form of the pure enantiomere, and also asracemates or diastereomer mixtures.

Preferred are synergistic microstructures which comprise as component A)picolinafen, a compound of group B) and a herbicide selected of thegroups D1 to D16:

D1 acetyl-CoA carboxylase inhibitors (ACC), for example

-   -   cyclohexenone oxime ethers, such as alloxydim, clethodim,        cloproxydim, cycloxydim, sethoxydim, tralkoxydim, butroxydim,        clefoxydim or tepraloxydim;    -   phenoxyphenoxypropionic esters, such as clodinafop-propargyl,        cyhalofopbutyl, diclofop-methyl, fenoxaprop-ethyl,        fenoxaprop-P-ethyl, fenthiapropethyl, fluazifop-butyl,        fluazifop-P-butyl, haloxyfop-ethoxyethyl, haloxyfop-methyl,        haloxyfop-P-methyl, isoxapyrifop, propaquizafop,        quizalofop-ethyl, quizalofop-P-ethyl or quizalofop-tefuryl; or    -   arylaminopropionic acids, such as flamprop-methyl or        flamprop-isopropyl;

D2 acetolactate synthase inhibitors (ALS), for example

-   -   imidazolinones, such as imazapyr, imazaquin,        imazamethabenz-methyl (imazame), imazamox, imazapic or        imazethapyr;    -   pyrimidyl ethers, such as pyrithiobac-acid, pyrithiobac-sodium,        bispyribac-sodium, KIH-6127 or pyribenzoxym;    -   sulfonamides, such as cloransulam, diclosulam, florasulam,        flumetsulam, metosulam or penoxsulam; or

D3 amides, for example

-   -   allidochlor (CDAA), benzoylprop-ethyl, bromobutide,        chlorthiamid, diphenamid, etobenzanid (benzchlomet),        fluthiamide, fosamin or monalide;

D4 auxin herbicides, for example

-   -   pyridinecarboxylic acids, such as clopyralid or picloram; or    -   2,4-D or benazolin;

D5 auxin transport inhibitors, for example

-   -   naptalame or diflufenzopyr;

D6 carotenoid biosynthesis inhibitors, for example

-   -   benzofenap, clomazone (dimethazone), diflufenican,        fluorochloridone, fluridone, pyrazolynate, pyrazoxyfen,        isoxaflutole, isoxachlortole, mesotrione, sulcotrione        (chlormesulone), ketospiradox, flurtamone, norflurazon or        amitrol;

D7 enolpyruvylshikimate-3-phosphate synthase inhibitors (EPSPS), forexample

-   -   glyphosate or sulfosate;

D8 glutamine synthetase inhibitors, for example

-   -   bilanafos (bialaphos) or glufosinate-ammonium;

D9 lipid biosynthesis inhibitors, for example

-   -   anilides, such as anilofos or mefenacet;    -   chloroacetanilides, such as dimethenamid, S-dimethen-amid,        acetochlor, alachlor, butachlor, butenachlor, diethatyl-ethyl,        dimethachlor, metazachlor, metolachlor, S-metolachlor,        pretilachlor, propachlor, prynachlor, terbuchlor, thenylchlor or        xylachlor,    -   thioureas, such as butylate, cycloate, di-allate, dimepiperate,        EPTC, esprocarb, molinate, pebulate, prosulfocarb, thiobencarb        (benthiocarb), tri-allate or vemolate; or    -   benfuresate or perfluidone;

D10 mitosis inhibitors, for example

-   -   carbamates, such as asulam, carbetamid, chlorpropham, orbencarb,        pronamid (propyzamid), propham or tiocarbazil;    -   dinitroanilines, such as benefin, butralin, dinitramin,        ethalfluralin, fluchloralin, oryzalin, pendimethalin, prodiamine        or trifluralin;    -   pyridines, such as dithiopyr or thiazopyr; or    -   butamifos, chlorthal-dimethyl (DCPA) or maleic hydrazide;

D11 protoporphyrinogen IX oxidase inhibitors, for example

-   -   diphenyl ethers, such as acifluorfen, acifluorfen-sodium,        aclonifen, bifenox, chlornitrofen (CNP), ethoxyfen, fluorodifen,        fluoroglycofen-ethyl, fomesafen, furyloxyfen, lactofen,        nitrofen, nitrofluorfen or oxyfluorfen;    -   oxadiazoles, such as oxadiargyl or oxadiazon;    -   cyclic imides, such as azafenidin, butafenacil,        carfentrazone-ethyl, cinidon-ethyl, flumiclorac-pentyl,        flumioxazin, flumipropyn, flupropacil, fluthiacet-methyl,        sulfentrazone or thidiazimin; or    -   pyrazoles, such as ET-751, JV 485 or nipyraclofen;

D12 photosynthesis inhibitors, for example

-   -   propanil, pyridate or pyridafol;    -   benzothiadiazinones, such as bentazone;    -   dinitrophenols, for example bromofenoxim, dinoseb,        dinoseb-acetate, dinoterb or DNOC;    -   dipyridylenes, such as cyperquat-chloride,        difenzoquat-methylsulfate, diquat or paraquat-dichloride;    -   ureas, such as chlorbromuron, chlorotoluron, difenoxuron,        dimefuron, diuron, ethidimuron, fenuron, fluometuron,        isoproturon, isouron, linuron, methabenzthiazuron, methazole,        metobenzuron, metoxuron, monolinuron, neburon, siduron or        tebuthiuron;    -   phenols, such as bromoxynil or ioxynil;    -   chloridazon;    -   triazines, such as ametryn, atrazine, cyanazine, desmetryn,        dimethamethryn, hexazinone, prometon, prometryn, propazine,        simazine, simetryn, terbumeton, terbutryn, terbutylazine or        trietazine;    -   triazinones, such as metamitron or metribuzin;    -   uracils, such as bromacil, lenacil or terbacil; or    -   biscarbamates, such as desmedipham or phenmedipham;

D13 synergists, for example

-   -   oxiranes, such as tridiphane;

D14 growth substances, for example

-   -   aryloxyalkanoic acids, such as 2,4-DB, clomeprop, dichlorprop,        dichlorprop-P (2,4-DP-P), fluoroxypyr, MCPA, MCPB, mecoprop,        mecoprop-P or triclopyr;    -   benzoic acids, such as chloramben or dicamba; or    -   quinolinecarboxylic acids, such as quinclorac or quinmerac;

D15 cell wall synthesis inhibitors, for example

-   -   isoxaben or dichlobenil;

D16 various other herbicides, for example

-   -   dichloropropionic acids, such as dalapon;    -   dihydrobenzofurans, such as ethofumesate;    -   phenylacetic acids, such as chlorfenac (fenac); or    -   aziprotryn, barban, bensulide, benzthiazuron, benzo-fluor,        buminafos, buthidazole, buturon, cafenstrole, chlorbufam,        chlorfenprop-methyl, chloroxuron, cinmethylin, cumyluron,        cycluron, cyprazine, cyprazole, dibenzyluron, dipropetryn,        dymron, eglinazin-ethyl, endothall, ethiozin, flucabazone,        fluorbentranil, flupoxam, isocarbamid, isopropalin, karbutilate,        mefluidide, monuron, napropamide, napropanilide, nitralin,        oxaciclomefone, phenisopham, piperophos, procyazine,        profluralin, pyributicarb, secbumeton, sulfallate (CDEC),        terbucarb, triaziflam, triazofenamid or trimeturon;

or their environmentally compatible salts, “acids”, esters and amides.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, a compound of group B), as component C) cloquintocet,preferably cloquintocet “acid”, cloquintocet mexyl or cloquintocet mexylx n hydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl and a herbicide selected of the groups D1 to D16:

D1 acetyl-CoA carboxylase inhibitors (ACC), for example

-   -   cyclohexenone oxime ethers, such as alloxydim, clethodim,        cloproxydim, cycloxydim, sethoxydim, tralkoxydim, butroxydim,        clefoxydim or tepraloxydim;    -   phenoxyphenoxypropionic esters, such as clodinafop-propargyl,        cyhalofopbutyl, diclofop-methyl, fenoxaprop-ethyl,        fenoxaprop-P-ethyl, fenthiapropethyl, fluazifop-butyl,        fluazifop-P-butyl, haloxyfop-ethoxyethyl, haloxyfop-methyl,        haloxyfop-P-methyl, isoxapyrifop, propaquizafop,        quizalofop-ethyl, quizalofop-P-ethyl or quizalofop-tefuryl; or    -   arylaminopropionic acids, such as flamprop-methyl or        flamprop-isopropyl;

D2 acetolactate synthase inhibitors (ALS), for-example

-   -   imidazolinones, such as imazapyr, imazaquin,        imazamethabenz-methyl (imazame), imazamox, imazapic or        imazethapyr;    -   pyrimidyl ethers, such as pyrithiobac-acid, pyrithiobac-sodium,        bispyribac-sodium, KIH-6127 or pyribenzoxym;    -   sulfonamides, such as cloransulam, diclosulam, florasulam,        flumetsulam, metosulam or penoxsulam; or    -   flucarbazone or propoxycarbazone;

D3 amides, for example

-   -   allidochlor (CDAA), benzoylprop-ethyl, bromobutide,        chlorthiamid, diphenamid, etobenzanid (benzchlomet),        fluthiamide, fosamin or monalide;

D4 auxin herbicides, for example

-   -   pyridinecarboxylic acids, such as clopyralid or picloram; or    -   2,4-D or benazolin;

D5 auxin transport inhibitors, for example

-   -   naptalame or diflufenzopyr;

D6 carotenoid biosynthesis inhibitors, for example

-   -   benzofenap, clomazone (dimethazone), diflufenican,        fluorochloridone, fluridone, pyrazolynate, pyrazoxyfen,        isoxaflutole, isoxachlortole, mesotrione, sulcotrione        (chlormesulone), ketospiradox, flurtamone, norflurazon or        amitrol;

D7 enolpyruvylshikimate-3-phosphate synthase inhibitors (EPSPS), forexample

-   -   glyphosate or sulfosate;

D8 glutamine synthetase inhibitors, for example

-   -   bilanafos (bialaphos) or glufosinate-ammonium;

D9 lipid biosynthesis inhibitors, for example

-   -   anilides, such as anilofos, flufenacet or mefenacet;    -   chloroacetanilides, such as dimethenamid, S-dimethen-amid,        acetochlor, alachlor, butachlor, butenachlor, diethatyl-ethyl,        dimethachlor, metazachlor, metolachlor, S-metolachlor,        pretilachlor, propachlor, prynachlor, terbuchlor, thenylchlor or        xylachlor;    -   thioureas, such as butylate, cycloate, di-allate, dimepiperate,        EPTC, esprocarb, molinate, pebulate, prosulfocarb, thiobencarb        (benthiocarb), tri-allate or vemolate; or    -   benfuresate or perfluidone;

D10 mitosis inhibitors, for example

-   -   carbamates, such as asulam, carbetamid, chlorpropham, orbencarb,        pronamid (propyzamid), propham or tiocarbazil;    -   dinitroanilines, such as benefin, butralin, dinitramin,        ethalfluralin, fluchloralin, oryzalin, pendimethalin, prodiamine        or trifluralin;    -   pyridines, such as dithiopyr or thiazopyr; or    -   butamifos, chlorthal-dimethyl (DCPA) or maleic hydrazide;

D11 protoporphyrinogen IX oxidase inhibitors, for example

-   -   diphenyl ethers, such as acifluorfen, acifluorfen-sodium,        aclonifen, bifenox, chlornitrofen (CNP), ethoxyfen, fluorodifen,        fluoroglycofen-ethyl, fomesafen, furyloxyfen, lactofen,        nitrofen, nitrofluorfen or oxyfluorfen;    -   oxadiazoles, such as oxadiargyl or oxadiazon;    -   cyclic imides, such as azafenidin, butafenacil,        carfentrazone-ethyl, cinidon-ethyl, flumiclorac-pentyl,        flumioxazin, flumipropyn, flupropacil, fluthiacet-methyl,        sulfentrazone or thidiazimin; or    -   pyrazoles, such as ET-751, JV 485 or nipyraclofen;

D12 photosynthesis inhibitors, for example

-   -   propanil, pyridate or pyridafol;    -   benzothiadiazinones, such as bentazone;    -   dinitrophenols, for example bromofenoxim, dinoseb,        dinoseb-acetate, dinoterb or DNOC;    -   dipyridylenes, such as cyperquat-chloride,        difenzoquat-methylsulfate, diquat or paraquat-dichloride;    -   ureas, such as chlorbromuron, chlorotoluron, difenoxuron,        dimefuron, diuron, ethidimuron, fenuron, fluometuron,        isoproturon, isouron, linuron, methabenzthiazuron, methazole,        metobenzuron, metoxuron, monolinuron, neburon, siduron or        tebuthiuron;    -   phenols, such as bromoxynil or ioxynil;    -   chloridazon;    -   triazines, such as ametryn, atrazine, cyanazine, desmetryn,        dimethamethryn, hexazinone, prometon, prometryn, propazine,        simazine, simetryn, terbumeton, terbutryn, terbutylazine or        trietazine;    -   triazinones, such as metamitron or metribuzin;    -   uracils, such as bromacil, lenacil or terbacil; or    -   biscarbamates, such as desmedipham or phenmedipham;

D13 synergists, for example

-   -   oxiranes, such as tridiphane;

D14 growth substances, for example

-   -   aryloxyalkanoic acids, such as 2,4-DB, clomeprop, dichlorprop,        dichlorprop-P (2,4-DP-P), fluoroxypyr, MCPA, MCPB, mecoprop,        mecoprop-P or triclopyr;    -   benzoic acids, such as chloramben or dicamba; or    -   quinolinecarboxylic acids, such as quinclorac or quinmerac;

D15 cell wall synthesis inhibitors, for example

-   -   isoxaben or dichlobenil;

D16 various other herbicides, for example

-   -   dichloropropionic acids, such as dalapon;    -   dihydrobenzofurans, such as ethofumesate;    -   phenylacetic acids, such as chlorfenac (fenac); or    -   aziprotryn, barban, bensulide, benzthiazuron, benzo-fluor,        buminafos, buthidazole, buturon, cafenstrole, chlorbufam,        chlorfenprop-methyl, chloroxuron, cinmethylin, cumyluron,        cycluron, cyprazine, cyprazole, dibenzyluron, dipropetryn,        dymron, eglinazin-ethyl, endothall, ethiozin, flucabazone,        fluorbentranil, flupoxam, isocarbamid, isopropalin, karbutilate,        mefluidide, monuron, napropamide, napropanilide, nitralin,        oxaciclomefone, phenisopham, piperophos, procyazine,        profluralin, pyributicarb, secbumeton, sulfallate (CDEC),        terbucarb, triaziflam, triazofenamid or trimeturon;

or their environmentally compatible salts, “acids”, esters and amides.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, a compound of group B), as component C) cloquintocet,preferably cloquintocet “acid”, cloquintocet mexyl or cloquintocet mexylx n hydrate.(n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl and a herbicide selected of the groups D1 to D16:

D1 acetyl-CoA carboxylase inhibitors (ACC), for example

-   -   cyclohexenone oxime ethers, such as alloxydim, clethodim,        cloproxydim, cycloxydim, sethoxydim, tralkoxydim, butroxydim,        clefoxydim or tepraloxydim;    -   phenoxyphenoxypropionic esters, such as clodinafop-propargyl,        cyhalofop-butyl, diclofop-methyl, fenoxaprop-ethyl,        fenoxaprop-P-ethyl, fenthiapropethyl, fluazifop-butyl,        fluazifop-P-butyl, haloxyfop-ethoxyethyl, haloxyfop-methyl,        haloxyfop-P-methyl, isoxapyrifop, propaquizafop,        quizalofop-ethyl, quizalofop-P-ethyl or quizalofop-tefuryl; or    -   arylaminopropionic acids, such as flamprop-methyl or        flamprop-isopropyl;

D2 acetolactate synthase inhibitors (ALS), for example

-   -   imidazolinones, such as imazapyr, irnazaquin,        imazamethabenz-methyl (imazame), imazamox, imazapic or        imazethapyr;    -   pyrimidyl ethers, such as pyrithiobac-acid, pyrithiobac-sodium,        bispyribac-sodium, KIH-6127 or pyribenzoxym;    -   sulfonamides, such as cloransulam, diclosulam, florasulam,        flumetsulam, metosulam or penoxsulam;

D3 amides, for example

-   -   allidochlor (CDM), benzoylprop-ethyl, bromobutide, chlorthiamid,        diphenamid, etobenzanid (benzchlomet), fluthiamide, fosamin or        monalide;

D4 auxin herbicides, for example

-   -   pyridinecarboxylic acids, such as clopyralid or picloram; or    -   2,4-D or benazolin;

D5 auxin transport inhibitors, for example

-   -   naptalame or diflufenzopyr;

D6 carotenoid biosynthesis inhibitors, for example

-   -   benzofenap, clomazone (dimethazone), diflufenican,        fluorochloridone, fluridone, pyrazolynate, pyrazoxyfen,        isoxaflutole, isoxachlortole, mesotrione, sulcotrione        (chlormesulone), ketospiradox, flurtamone, norflurazon or        amitrol;

D7 enolpyruvylshikimate-3-phosphate synthase inhibitors (EPSPS), forexample

-   -   glyphosate or sulfosate;

D8 glutamine synthetase inhibitors, for example

-   -   bilanafos (bialaphos) or glufosinate-ammonium;

D9 lipid biosynthesis inhibitors, for example

-   -   anilides, such as anilofos or mefenacet;    -   chloroacetanilides, such as dimethenamid, S-dimethen-amid,        acetochlor, alachlor, butachlor, butenachlor, diethatyl-ethyl,        dimethachlor, metazachlor, metolachlor, S-metolachlor,        pretilachlor, propachlor, prynachlor, terbuchlor, thenylchlor or        xylachlor;    -   thioureas, such as butylate, cycloate, di-allate, dimepiperate,        EPTC, esprocarb, molinate, pebulate, prosulfocarb, thiobencarb        (benthiocarb), tri-allate or vernolate; or    -   benfuresate or perfluidone;

D10 mitosis inhibitors, for example

-   -   carbamates, such as asulam, carbetamid, chlorpropham, orbencarb,        pronamid (propyzamid), propham or tiocarbazil;    -   dinitroanilines, such as benefin, butralin, dinitramin,        ethalfluralin, fluchloralin, oryzalin, pendimethalin, prodiamine        ortrifluralin;    -   pyridines, such as dithiopyr or thiazopyr; or    -   butamifos, chlorthaldimethyl (DCPA) or maleic hydrazide;

D11 protoporphyrinogen IX oxidase inhibitors, for example

-   -   diphenyl ethers, such as acifluorfen, acifluorfen-sodium,        aclonifen, bifenox, chlornitrofen (CNP), ethoxyfen, fluorodifen,        fluoroglycofen-ethyl, fomesafen, furyloxyfen, lactofen,        nitrofen, nitrofluorfen or oxyfluorfen;    -   oxadiazoles, such as oxadiargyl or oxadiazon;    -   cyclic imides, such as azafenidin, butafenacil,        carfentrazone-ethyl, cinidon-ethyl, flumiclorac-pentyl,        flumioxazin, flumipropyn, flupropacil, fluthiacet-methyl,        sulfentrazone or thidiazimin; or    -   pyrazoles, such as ET-751, JV 485 or nipyraclofen;

D12 photosynthesis inhibitors, for example

-   -   propanil, pyridate or pyridafol;    -   benzothiadiazinones, such as bentazone;    -   dinitrophenols, for example bromofenoxim, dinoseb,        dinoseb-acetate, dinoterb or DNOC;    -   dipyridylenes, such as cyperquat-chloride,        difenzoquat-methylsulfate, diquat or paraquat-dichloride;    -   ureas, such as chlorbromuron, chlorotoluron, difenoxuron,        dimefuron, diuron, ethidimuron, fenuron, fluometuron,        isoproturon, isouron, linuron, methabenzthiazuron, methazole,        metobenzuron, metoxuron, monolinuron, neburon, siduron or        tebuthiuron;    -   phenols, such as bromoxynil or ioxynil;    -   chloridazon;    -   triazines, such as ametryn, atrazine, cyanazine, desmetryn,        dimethamethryn, hexazinone, prometon, prometryn, propazine,        simazine, simetryn, terbumeton, terbutryn, terbutylazine or        trietazine;    -   triazinones, such as metamitron or metribuzin;    -   uracils, such as bromacil, lenacil or terbacil; or    -   biscarbamates, such as desmedipham or phenmedipham;

D13 synergists, for example

-   -   oxiranes, such as tridiphane;

D14 growth substances, for example

-   -   aryloxyalkanoic acids, such as 2,4-DB, clomeprop, dichlorprop,        dichlorprop-P (2,4-DP-P), fluoroxypyr, MCPA, MCPB, mecoprop,        mecoprop-P or triclopyr;    -   benzoic acids, such as chloramben or dicamba; or    -   quinolinecarboxylic acids, such as quinclorac or quinmerac;

D15 cell wall synthesis inhibitors, for example

-   -   isoxaben or dichlobenil;

D16 various other herbicides, for example

-   -   dichloropropionic acids, such as dalapon;    -   dihydrobenzofurans, such as ethofumesate;    -   phenylacetic acids, such as chlorfenac (fenac); or    -   aziprotryn, barban, bensulide, benzthiazuron, benzo-fluor,        buminafos, buthidazole, buturon, cafenstrole, chlorbufam,        chlorfenprop-methyl, chloroxuron, cinmethylin, cumyluron,        cycluron, cyprazine, cyprazole, dibenzyluron, dipropetryn,        dymron, eglinazin-ethyl, endothall, ethiozin, flucabazone,        fluorbentranil, flupoxam, isocarbamid, isopropalin, karbutilate,        mefluidide, monuron, napropamide, napropanilide, nitralin,        oxaciclomefone, phenisopham, piperophos, procyazine,        profluralin, pyributicarb, secbumeton, sulfallate (CDEC),        terbucarb, triaziflam, triazofenamid or trimeturon;

or their environmentally compatible salts, “acids”, esters and amides.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) tritosulfuron and as component D)flucarbazone.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) tritosulfuron, as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl, and as component D) flucarbazone.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) tritosulfuron and as component D)propoxycarbazone.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) tritosulfuron, as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl, and as component D) propoxycarbazone.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) triasulfuron and as component D) dicamba.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) triasulfuron, as component C) cloquintocet,preferably cloquintocet “acid”, cloquintocet mexyl or cloquintocet mexylx n hydrate (n=2 to 6); isoxadifen, preferably isoxadifen “acid” orisoxadifen ethyl; or mefenpyr, preferably mefenpyr “acid” or mefenpyrdiethyl, and as component D) dicamba.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) chlorsulfuron and as component D) dicamba.

Also preferred are synergistic mixtures which comprise as component A)picolinafen, as component B) chlorsulfuron, as component C)cloquintocet, preferably cloquintocet “acid”, cloquintocet mexyl orcloquintocet mexyl x n hydrate (n=2 to 6); isoxadifen, preferablyisoxadifen “acid” or isoxadifen ethyl; or mefenpyr, preferably mefenpyr“acid” or mefenpyr diethyl, and as component D) dicamba.

Preferred are synergistic mixtures which comprise as active ingredientsonly picolinafen and one compound of group B).

Especially preferred synergistic mixtures thereof are in analogy to theabove-mentioned ones.

Also preferred are synergistic mixtures which comprise as activeingredients only picolinafen, one compound of group B) and one compoundof group C).

Especially preferred synergistic mixtures thereof are in analogy to theabove-mentioned ones.

Also preferred are synergistic mixtures which comprise as activeingredients only picolinafen, one compound of group B) and one compoundof group D).

Especially preferred synergistic mixtures thereof are in analogy to theabove-mentioned ones.

Also preferred are synergistic mixtures which comprise as activeingredients only picolinafen, one compound of group B), one compound ofgroup C) and one compound of group D).

Especially preferred synergistic mixtures thereof are in analogy to theabove-mentioned ones.

Picolinafen is disclosed in EP 447 004.

The compounds of group B) are described, for example, in

-   -   “Herbizide [Herbicides]”, Hock, Fedtke, Schmidt, 1st edition,        Thieme 1995 (“azimsulfuron (DPX-A-8947)” p. 175,        “bensulfuron” p. 31, “pyrazosulfuron” p. 31, “cinosulfuron” p.        31, “ethametsulfuron ” p. 36, “thifensulfuron ” p. 35;    -   “Short Review of Herbicides & PGRs 1991, Hodogaya Chemicals    -   (“chlorimuron” p. 92, “chlorsulfuron” p. 92, “flazasulfuron” p.        96, “metsulfuron” S.92, “nicosulfuron” p. 96, “sulfometuron ” p.        92, “triasulfuron” p. 94);    -   “Agricultural Chemicals”, Book II Herbicides, 1993 (s.        “imazosulfuron (TH-913)” p. 150, halosulfuron” p. 148,        “rimsulfuron” p. 138, “tribenuron” p. 139, “trflusulfuron ” p.        137, “primisulfuron” p. 147);    -   “Agricultural Chemicals”, Book II Herbicides, 13^(th) Edition        (s. “sulfosulfuron” p. 145, “ethoxysulfuron” p. 149);    -   “Brighton Crop Protection Conference—Weeds—1993” (s.        “prosulfuron” p. 53);    -   “Brighton Crop Protection Conference—Weeds—1995” (s.        “flupyrsulfuron” p. 50);    -   “Brighton Crop Protection Conference—Weeds—1999” (s.        “iodosulfuron” p. 16);    -   “The Pesticide Manual, 12^(th) edition” (“cyclosulfamuron” p.        217);    -   “Agrow No. 347, Mar. 3^(rd) 2000” (Cmesosulfuron” p. 22);    -   “Farm Chemicals Handbook 2002” (“trifloxysulfuron” C405);    -   PCT/EP 96/03996 (“tritosulfuron”).

The compounds of group C) are described, for example, in

-   -   “Herbizide [Herbicides]”, Hock, Fedtke, Schmidt, 1st edition,        Thieme 1995 (“dichlormid” p. 263, “benoxacor” p. 263,        “LAB-145138” p. 263, “MG-191” p. 263, “MON-13900” p. 263,        “cyometrinil” p. 265,” oxabetrinil” p. 265, “fluxofenim” p. 265,        “flurazole” p. 265, “naphtalic acid anhydride” p. 265,        “fenchlorim” p. 266, “fenchlorazol” p. 266, “cloquintocet” p.        266);    -   WO 91/07874 (“mefenpyr”);    -   WO 99/00020        (“1-ethyl-4-hydroxy-3-(1H-tetrazol-5-yl)-1H-quinolin-2-one”);    -   EP 613 618 (“4-carboxymethyl-chroman-4-carboxylic acid”);    -   U.S. Pat. No. 5,215,570        (“N-(2-methoxy-benzoyl)-4-(3-methylureido)-benzenesulfon-amide”);    -   EP 929 543 (“3-oxo-isothiochroman-4-ylidenemethoxy)-acetic acid        methyl ester”).

The herbicidally active compounds from amongst groups D1 to D1 6 aredescribed, for example, in

-   -   “Herbizide [Herbicides]”, Hock, Fedtke, Schmidt, 1st edition,        Thieme 1995 (s. “quinclorac” p. 238, “molinat” p. 32,        “butachlor” p. 32, “pretilachlor” p. 32, “dithiopyr” p. 32,        “mefenacet“p. 32, “fenoxapropethyl” p. 216, “dimepiperate” p.        32, “pyrazolynate” p. 146, “pyrazoxyfen” p. 146,        “benfuresate” p. 233, “bromobutide” p. 243, “dymron” p. 243,        “dimethyametryn” p. 118, “esprocarb” p. 229, “pyributicarb” p.        32, “cinemthylin” p. 32, “propanil” p. 32, “2,4-D” p. 30,        “bentazon” p. 30, “mecoprop-P” p. 237, “chlorpropham” p. 205,        “ethoxyfen” p. 30, “haloxyfop-P-methyl” p. 38,        “haloxyfop-ethoxyethyl” p. 38, “flumicloracpentyl” p. 35,        “flupropacil” p. 143, “nipyraclofen” p. 145, “pyrithiobac        acid” p. 181);    -   “Agricultural Chemicals”, Book II Herbicides, 1993 (s.        “thiobencarb” p. 85, “benzofenap” p. 221, “napropanilid” p. 49,        “piperophos” p. 102, “anilofos” p. 241, “etobenzamid (HW-52)” p.        54, “sulcotrione (ICIA-0051)” p. 268, “poast” p. 253, “focus” p.        222, “dimethenamid” p. 48, “sulfosate” p. 236, “2,4-DB” p. 10,        “dichlorprop-P” p. 6, “flupoxam” p. 44, “prosulfocarb” p. 84,        “quinmerac” p. 233, “metazachlor” p. 64, “flurtamone” p. 265,        “bromofenoxim” p. 228, “fome-safen” p. 248,        “imazamethabenz-methyl” p. 153, “clodinafop-propargyl” p. 214,        “fenoxaprop-P-ethyl” p. 208, “fluazifop-P-butyl” p. 207,        “quizalofop-P-ethyl” p. 210, “quizalofop-terfuryl” p. 211,        “flumioxazin” p. 43, “flumipropyn” p. 267, “sulfentrazone” p.        261, “thiazopyr” p. 226, “pyrithiobac-sodium” p. 266,        “amidosulfuron” p. 151);    -   “Agricultural Chemicals”, Book II Herbicides, 13^(th) Edition        (s. “carfenstole” p. 284, “pyribenzoxym” p. 279,        “diflufenzopyr” p. 90, “ET-751” p. 278,        “carfen-trazone-ethyl” p. 267, “fluthiacet-methyl” p. 277,        “imazapic” p. 160, “butenachlor” p. 54, “tiocarbazil” p. 84,        “fluthiamide” p. 62, “isoxaflutole” p. 283, “butroxydim” p.        259,)    -   “Short Review of Herbicides & PGRs 1991, Hodogaya Chemicals (s.        “furyloxyfen” p. 142, “triazofenamid” p. 268, “thenylchlorid        (NSK-850)” p. 52, “cumyluron (JC-940)” p. 90, “pendimethalin        (AC-92553)” p. 58, “buthidazole” p. 88, “cyprazole” p. 38,        “allidochlor” p. 48, “benzoylprop-ethyl” p. 38,        “chlorthiamid” p. 150, “diphenamid” p. 34, “flamprop-methyl” p.        40, “fosamin” p. 232, “isoxaben” p. 42, “monalide” p. 32,        “naptalam” p. 36, “pronamid” p. 34, “bialaphos” p. 234,        “glufosinate-ammonium” p. 234, “glyphosate” p. 232, “amitrol” p.        254, “clomeprop p. 20, “dlchlorprop” p. 6, “fenoprop” p. 8,        “fluroxypyr” p. 156, “MCPA” p. 4, “MCPB” p. 8, “mecoprop” p. 6,        “napropamide” p. 16, “triclopyr” p. 154, “chloramben” p. 28,        “dicamba” p. 26, “clomazone” p. 268, “diflufenican” p. 42,        “fluorochloridone” p. 266, “fluridone” p. 156, “asulam” p. 112,        “barban” p. 100, “butylate” p. 106, “carbetamide” p. 36,        “chlorobufam” p. 100, “cycloate” p. 108, “desmedipham” p. 104,        “di-allate” p. 106, “EPTC” p. 108, “orbencarb” p. 112,        “pebulate” p. 106, “phen-isopham” p. 118, “phenmedipham” p. 104,        “propham” p. 100, “sulfallate” p. 110, “terbucarb” p. 102,        “tri-allate” p. 108, “vernolate” p. 108, “acetochlor” p. 48,        “alachlor” p. 46, “diethathyl-ethyl” p. 48, “dimethachlor” p.        50, “metolachlor” p. 46, “propachlor” p. 44, “pyrnachlor” p. 44,        “terbuchlor” p. 48, “xylachloe” p. 52, “alloxydim” p. 260,        “clethodim” p. 270, “cloproxydim” p. 268, “tralkoxydim” p. 270,        “dalapon” p. 212, “ethofumesate” p. 124, “benefin” p. 54,        “butralin” p. 58, “dinitramin” p. 56, “ethalfluralin” p. 60,        “fluchloralin” p. 54, “isopropalin” p. 58, “nitralin” p. 58,        “oryzalin” p. 60, “prodiamine” p. 62, “profluralin” p. 54,        “trifluralin” p. 54, “dinoseb” p. 128, “dinoseb-acetate” p. 128,        “dinoterb” p. 128, “DNOC” p. 126, “acifluorfen-sodium” p. 142,        “aclonifen” p. 146, “bifenox” p. 140, “chlornitrofen” p. 138,        “difenoxuron” p. 76, “fluorodifen” p. 138,        “fluoroglycofen-ethyl” p. 146, “lactofen” p. 144, “nitrofen” p.        136, “nitrofluorfen” p. 140, “oxyfluorfen” p. 140,        “cyperquat-chloride” p. 158, “difenzoquat-methyl-sulfate” p.        160, “diquat” p. 158, “paraquat-dichloride” p. 158,        “benzthiazuron” p. 82, “buturon” p. 66, “chlorbromuron” p. 72,        “chloroxuron” p. 76, “chlorotoluron” p. 74, “cycluron” p. 84,        “dimefuron” p. 88, “diuron” p. 70, “ethidimuron” p. 86,        “fenuron” p. 64, “fluometuron” p. 68, “isoproturon” p. 80,        “isouron” p. 88, “karbutilate” p. 76, “linuron” p. 72,        “methabenzthiazuron” p. 82, “metoxuron” p. 72, “monolinuron” p.        66, “monuron” p. 64, “neburon” p. 72, “siduron” p. 68,        “tebuthiuron” p. 86, “trimeturon” p. 64, “isocarbamid” p. 168,        “imazamethapyr” p. 172, “imazapyr” p. 170, “imaza-quin” p. 170,        “imazethapyr” p. 172, “methazole” p. 162, “oxadiazon” p. 162,        “tridiphane” p. 266, “bromoxynil” p. 148, “ioxynil” p. 148,        “diclofop-methyl” p. 16, “fenthiaprop-ethyl” p. 20,        “fluazifop-butyl” p. 18, “haloxyfop-methyl” p. 18,        “isoxapyrifop” p. 22, “propaquizafop” p. 24,        “quizalofop-ethyl” p. 20, “chlorfenac” p. 258,        “chlorfenprop-methyl” p. 258, “chloridazon” p. 174, “maleic        hydrazide” p. 162, “norflurazon” p. 174, “pyridate” p. 176,        “clopyralid” p. 154, “picloram” p. 154, “ametryn” p. 198,        “atrazine” p. 188, “aziprotryne” p. 206, “cyanazine” p. 192,        “cyprazine” p. 192, “desmetryne” p. 200, “dipropetryn” p. 202,        “eglinazine-ethyl” p. 208, “hexazinone” p. 208, “procyazine” p.        192, “prometone” p. 196, “prometryn” p. 196, “propazine” p. 188,        “secbumeton” p. 196, “simazine” p. 188, “simetryn” p. 196,        “terbumeton” p. 204, “terbutryn” p. 198, “terbutylazine” p. 190,        “trietazine” p. 188, “ethiozine” p. 210, “metamitron” p. 206,        “metribuzin” p. 202, “bromacil” p. 180, “lenacil” p. 180,        “terbacil” p. 180, “benazolin” p. 262, “bensulide” p. 228,        “benzofluor” p. 266, “butamifos” p. 228, “DCPAN p. 28,        “dichlobenil” p. 148, “endothal” p. 264, “mefluidide” p. 306,        “perfluidone” p. 260, “terbuchlor” p. 48);    -   “Global Herbicide Directory” First Edition, 1994 (s.        “oxadiargyl” p. 96);    -   “European Directory of Agrochemical Products” Volume        2—Herbicides” Fourth Edition, (s. “buminafos” p. 255).    -   “The Pesticide Manual”, 12t edition (“cloransulam” p. 196,        “diclosulam” p. 283, “florasulam” p. 420, “flumetsulam” p. 438,        “metosulam” p. 640).

Moreover, the compound “DEH-1 12” is disclosed in European PatentApplication EP-A 302 203. The compound “tepraloxydim” is described inDE-A 33 36 140; the compound “cinidon-ethyl” in DE-A 36 03 789,“fencarbazone” in EP 507 171, “foramsulfuron” in U.S. Pat. No.5,922,646, “propoxycarbazone” in EP 507 171 and the compound“fluorbentranil” in EP-A 84 893. Other compounds are known from“Brighton Crop Protection Conference—Weeds—1993” (S. “thidiazimin” p.29, “AC-322140” p. 41, “KIH-6127” p. 47, “KIH-2023” p. 61,“metobenzuron” p. 67). The compound “carfenstrole (CH-900)” is mentionedin EP-A 332 133 and “penoxsulam” is disclosed in U.S. Pat. No.5,858,924.

The assignment of the active ingredients to the respective mechanisms ofaction is based on current knowledge. If several mechanisms of actionapply to one active ingredient, this substance was only assigned to onemode of action.

The present invention also extends to herbicidal compositions whichcomprise a herbicidally active amount of a synergistic herbicidalmixture (comprising a compound of group A), a compound of group B), ifdesired, a compound of group C) and, if desired, a compound of group D)as described above), at least one liquid and/or solid carrier and, ifdesired, at least one surfactant.

The herbicidal compositions and synergistic herbicidal mixturesaccording to the invention can effect very good control of broad-leavedweeds and grass weeds in crops such as maize, cereals, rice and soyawithout damaging the crop plants, an effect observed especially even atlow rates of application.

Taking into consideration the variety of application method in question,the herbicidal compositions and synergistic herbicidal mixturesaccording to the invention can additionally be employed in a furthernumber of crop plants for eliminating undesirable plants. Examples ofsuitable crops are the following:

Allium cepa, Ananas comosus, Arachis hypogaea, Asparagus officinalis,Beta vulgaris ssp. altissima, Beta vulgaris ssp. rapa, Brassica napusvar. napus, Brassica napus var. napobrassica, Brassica rapa var.silvestris, Camellia sinensis, Carthamus tinctorius, Caryaillinoinensis, Citrus limon, Citrus sinensis, Coffea arabica (Coffeacanephora, Coffea liberica), Cucumis safivus, Cynodon dactylon, Daucuscarota, Elaeis guineensis, Fragaria vesca, Glycine max, Gossypiumhirsutum, (Gossypium arboreum, Gossypium herbaceum, Gossypiumvitifolium), Helianthus annuus, Hevea brasiliensis, Hordeum vulgare,Humulus lupulus, Ipomoea batatas, Juglans regia, Lens culinaris, Linumusitatissimum, Lycopersicon lycopersicum, Malus spp., Manihot esculenta,Medicago sativa, Musa spp., Nicotiana tabacum (N.rustica), Oleaeuropaea, Oryza sativa, Phaseolus lunatus, Phaseolus vulgaris, Piceaabies, Pinus spp., Pisum sativum, Prunus avium, Prunus persica, Pyruscommunis, Ribes sylvestre, Ricinus communis, Saccharum officinarum,Secale cereale, Solanum tuberosum, Sorghum bicolor (s. vulgare),Theobroma cacao, Trifolium pratense, Triticum aestivum, Triticum durum,Vicia faba, Vitis vinifera und Zea mays.

Moreover, the herbicidal compositions and synergistic herbicidalmixtures according to the invention may also be employed for controllingharmful plants in modified crops. These modified crops are obtained bygenetic engineering methods or by breeding, and—as a rule—they aredistinguished by particular, advantageous properties, for example byresistance to certain crop protection agents, resistance to plantdiseases or pathogens causing plant diseases such as particular insectsor microorganism such as fungi, bacteria or viruses. Other particularproperties relate, for example, to the harvested material in terms ofquality, storing properties, composition and specific constitutions.

The mixtures according to the invention, or the herbicidal compositionscomprising them, can be employed, for example, in the form of directlysprayable aqueous solutions, powders, suspensions, alsohighly-concentrated aqueous, oily or other suspensions or dispersions,emulsions, oil dispersions, pastes, dusts, materials for spreading orgranules, by means of spraying, atomizing, dusting, spreading orpouring.

The use forms depend on the intended purposes; in any case, they shouldguarantee the finest possible distribution of the active ingredientsaccording to the invention.

Suitable inert auxiliaries are mineral oil fractions of medium to highboiling point such as kerosene and diesel oil, furthermore coal tar oilsand oils of vegetable or animal origin, aliphatic, cyclic and aromatichydrocarbons, e.g. paraffins, tetrahydronaphthalene, alkylatednaphthalenes and their derivatives, alkylated benzenes and theirderivatives, alcohols such as methanol, ethanol, propanol, butanol andcyclohexanol, ketones such as cyclohexanone, strongly polar solvents,such as N-methylpyrrolidone and water.

Aqueous use forms can be prepared from emulsion concentrates,suspensions, pastes, wettable powders or water-dispersible granules byadding water. To prepare emulsions, pastes or oil dispersions, thesubstances, as such or dissolved in an oil or solvent, can behomogenized in water by means of wetting agent, tackifier, dispersant oremulsifier. However, it is also possible to prepare concentratescomposed of active substance, wetting agent, tackifier, dispersant oremulsifier and, if appropriate, solvent or oil, and these concentratesare suitable for dilution with water.

Suitable surfactants are the alkali metal, alkaline earth metal andammonium salts of aromatic sulfonic acids, e.g. ligno-, phenol-,naphthalene- and dibutyinaphthalene-sulfonic acid, and of fatty acids,of alkyl- and alkylaryl sulfonates, of alkyl sulfates, lauryl ethersulfates and fatty alcohol sulfates, and salts of sulfated hexa-, hepta-and octa-decanols, and of fatty alcohol glycol ether, condensates ofsulfonated naphthalene and its derivatives with formaldehyde,condensates of naphthalene, or of the naphthalene-sulfonic acids, withphenol and formaldehyde, polyoxyethylene octylphenyl ether, ethoxylatedisooctyl-, octyl- or nonylphenol, alkylphenyl and tributylphenylpolyglycol ether, alkylaryl polyether alcohols, isotridecyl alcohol,fatty alcohol/ethylene oxide condensates, ethoxylated castor oil,polyoxyethylene alkyl ethers or polyoxypropylene alkyl ethers, laurylalcohol polyglycol ether acetate, sorbitol esters, lignin-sulfite wasteliquors or methylcellulose.

Powders, materials for spreading and dusts can be prepared by mixing orconcomitantly grinding the synergistic herbicidal mixture or theindividual active ingredients with a solid carrier.

Granules, e.g. coated granules, impregnated granules and homogeneousgranules, can be prepared by binding the active ingredients to solidcarriers. Solid carriers are mineral earths such as silicas, silicagels, silicates, talc, kaolin, limestone, lime, chalk, bole, loess,clay, dolomite, diatomaceous earth, calcium sulfate, magnesium sulfate,magnesium oxide, ground synthetic material, fertilizers such as ammoniumsulfate, ammonium phosphate, ammonium nitrate, ureas and products ofvegetable origin such as cereal meal, tree bark meal, wood meal andnutshell meal, cellulose powders or other solid carriers.

The concentrations of the mixtures according to the invention in theready-to-use products can be varied within wide ranges. In general, theformulations comprise from 0.01 to 95% by weight, preferably 0.5 to 90%by weight, of the mixture according to the invention.

The compounds of the groups A) and B), if desired, C) and, if desiredD), can be formulated jointly, but also separately, and/or applied tothe plants, their environment and/or seeds jointly or separately.

In case a compound of group C) is present in the mixture according tothe invention it can be used for penetrating the seed of a crop plant(seed dressing), or be incorporated into the seed furrows prior tosowing. The other compounds of the groups A), B) and, if desired, D) areapplied then separately from the compound of group C).

It is preferable to apply the active ingredients simultaneously.However, it is also possible to apply them separately.

Moreover, it may be advantageous to apply the herbicidal compositionsand synergistic herbicidal mixtures according to the invention, jointlyor separately, with additional other crop protection agents, for examplewith pesticides or agents for controlling phytopathogenic fungi orbacteria. Also of interest is the miscibility with mineral saltsolutions which are employed for treating nutritional and trace elementdeficiencies. Non-phytotoxic oils and oil concentrates can also beadded.

The mixtures according to the invention and the herbicidal compositionscan be applied pre- or post-emergence. If the active ingredients areless well tolerated by certain crop plants, application techniques maybe used in which the herbicidal compositions are sprayed, with the aidof the spray apparatus, in such a way that they come into as littlecontact, if any, with the leaves of the sensitive crop plants whilereaching the leaves of undesirable plants which grow underneath, or thebare soil (post-directed, lay-by).

In the case of a post-emergence treatment of the plants, the herbicidalcompositions according to the invention are preferably applied by foliarapplication. Application may be effected, for example, by usual sprayingtechniques with water as the carrier, using amounts of spray mixture ofapprox. 100 to 1000 I/ha. The compositions may also be applied by theso-called “low-volume” and “ultra-low-volume” methods, or in the form ofso-called granules.

As a rule, the synergistic herbicidal mixtures comprise the compounds ofthe groups A) and B) if desired, C), and, if desired, D) in such weightratios that the synergistic effect takes place.

The ratios of the compounds of the groups A) and B) in the mixturepreferably range from 1:0.0002 to 1:50.

The ratios of the compounds of the groups A) and C) in the mixturepreferably range from 1:0.0002 to 1:50.

The ratios of the compounds of the groups A) and D) in the mixturepreferably range from 1:0.001 to 1:400.

The rate of application of pure synergistic herbicidal mixture, i.e.without formulation auxiliaries, amounts to 0.1 to 5000 g/ha, preferably1 to 2000 g/ha, in particular 5 to 1000 g/ha, of active substance(a.s.), depending on the intended aim, the season, the target plants andgrowth stage.

The rate of application of picolinafen is 10 to 500 g/ha, as a rule 30to 100 g/ha, preferably 25 to 75 g/ha, of active substance (a.s.).

The application of the compound of group B) is 0.1 to 500 g/ha, as arule 0.5 to 150 g/ha, preferably 1 to 100 g/ha, of active substance(a.s.).

-   -   Especially the application rate of bensulfuron methyl is 1 to        400 g/ha, as a rule 10 to 250 g/ha, preferably 30 to 100 g/ha,        of active substance (a.s.).    -   Especially the application rate of chlorimuron ethyl is 0.1 to        250 g/ha, as a rule 1 to 50 g/ha, preferably 5 to 15 g/ha, of        active substance (a.s.).    -   Especially the application rate of chlorsulfuron is 0.1 to 500        g/ha, as a rule 1 to 100 g/ha, preferably 5 to 25 g/ha, of        active substance (a.s.).    -   Especially the application rate of cinosulfuron is 10 to 300        g/ha, as a rule 50 to 150 g/ha, preferably 20 to 80 g/ha, of        active substance (a.s.).    -   Especially the application rate of cyclosulfamuron is 5 to 500        g/ha, as a rule 10 to 200 g/ha, preferably 25 to 60 g/ha, of        active substance (a.s.).    -   Especially the application rate of ethametsulfuron methyl is 0.1        to 250 g/ha, as a rule 1 to 100 g/ha, preferably 10 to 20 g/ha,        of active substance (a.s.).    -   Especially the application rate of ethoxysulfuron is 0.1 to 500        g/ha, as a rule 1 to 250 g/ha, preferably 10 to 120 g/ha, of        active substance (a.s.).    -   Especially the application rate of flazasulfuron is 1 to 500        g/ha, as a rule 10 to 250 g/ha, preferably 25 to 100 g/ha, of        active substance (a.s.).    -   Especially the application rate of iodosulfuron methyl is 0.1 to        100 g/ha, as a rule 1 to 25 g/ha, preferably 3 to 10 g/ha, of        active substance (a.s.).    -   Especially the application rate of mesosulfuron methyl is 0.1 to        250 g/ha, as a rule 1 to 50 g/ha, preferably 5 to 15 g/ha, of        active substance (a.s.).    -   Especially the application rate of metsulfuron methyl is 0.1 to        150 g/ha, as a rule 1 to 50 g/ha, preferably 3 to 10 g/ha, of        active substance (a.s.).    -   Especially the application rate of nicosulfuron is 1 to 500        g/ha, as a rule 5 to 250 g/ha, preferably 20 to 70 g/ha, of        active substance (a.s.).    -   Especially the application rate of primisulfuron methyl is 1 to        500 g/ha, as a rule 5 to 200 g/ha, preferably 20 to 40 g/ha, of        active substance (a.s.).    -   Especially the application rate of prosulfuron is 0.5 to 500        g/ha, as a rule 2 to 200 g/ha, preferably 10 to 40 g/ha, of        active substance (a.s.).    -   Especially the application rate of sulfometuron methyl is 1 to        600 g/ha, as a rule 10 to 300 g/ha, preferably 30 to 100 g/ha,        of active substance (a.s.).    -   Especially the application rate of oxasulfuron is 2 to 600 g/ha,        as a rule 10 to 300 g/ha, preferably 50 to 100 g/ha, of active        substance (a.s.).    -   Especially the application rate of triasulfuron is 0.1 to 100        g/ha, as a rule 1 to 30 g/ha, preferably 5 to 10 g/ha, of active        substance (a.s.).    -   Especially the application rate of tribenuron methyl is 0.1 to        250 g/ha, as a rule 1 to 100 g/ha, preferably 5 to 30 g/ha, of        active substance (a.s.).    -   Especially the application rate of triflusulfuron methyl is 0.1        to 250 g/ha, as a rule 1 to 100 g/ha, preferably 10 to 20 g/ha,        of active substance (a.s.).    -   Especially the application rate of trifloxysulfuron is 0.1 to        250 g/ha, as a rule 1 to 100 g/ha, preferably 5 to 20 g/ha, of        active substance (a.s.).    -   Especially the application rate of tritosulfuron is 1 to 250        g/ha, as a rule 10 to 100 g/ha, preferably 30 to 50 g/ha, of        active substance (a.s.).    -   Especially the application rate of flupyrsulfuron methyl is 0.1        to 250 g/ha, as a rule 1 to 100 g/ha, preferably 5 to 10 g/ha,        of active substance (a.s.).    -   Especially the application rate of rimsulfuron is 0.1 to 250        g/ha, as a rule 1 to 50 g/ha, preferably 10 to 15 g/ha, of        active substance (a.s.).    -   Especially the application rate of thifensulfuron methyl is 0.1        to 500 g/ha, as a rule 1 to 200 g/ha, preferably 5 to 60 g/ha,        of active substance (a.s.).    -   Especially the application rate of azimsulfuron is 0.5 to 250        g/ha, as a rule 5 to 75 g/ha, preferably 15 to 25 g/ha, of        active substance (a.s.).    -   Especially the application rate of halosulfuron methyl is 1 to        500 g/ha, as a rule 5 to 200 g/ha, preferably 20 to 90 g/ha, of        active substance (a.s.).    -   Especially the application rate of imazosulfuron is 5 to 500        g/ha, as a rule 25 to 250 g/ha, preferably 75 to 100 g/ha, of        active substance (a.s.).    -   Especially the application rate of sulfosulfuron is 1 to 500        g/ha, as a rule 2 to 250 g/ha, preferably 10 to 50 g/ha, of        active substance (a.s.).    -   Especially the application rate of pyrazosulfuron is 1 to 300        g/ha, as a rule 5 to 100 g/ha, preferably 15 to 30 g/ha, of        active substance (a.s.).

The preferred rate of application of the optional compound of group C)is 0.1 to 700 g/ha (a.s.).

-   -   As a rule the application rate of dichlormid is 100 to 500 g/ha,        of active substance (a.s.).    -   As a rule the application rate of benoxacor is 20 to 150 g/ha,        of active substance (a.s.).    -   As a rule the application rate of cloquintocet is 1 to 50 g/ha,        of active substance (a.s.).    -   As a rule the application rate of isoxadifen is 25 to 150 g/ha,        of active substance (a.s.).    -   As a rule the application rate of mefenpyr is 5 to 250 g/ha, of        active substance (a.s.).

The preferred rate of application of the optional compound of group D)is 0.5 to 4000 g/ha, of active substance (a.s.).

-   -   As a rule the application rate of a sulfonylurea of group D) is        from 0.5 to 250 g/ha, as a rule from 1 to 125 g/ha, of active        substance (a.s.).        Use Examples

The mixtures according to the invention were applied pre- orpost-emergence (foliar treatment). The herbicidal compounds of groups A)and B) and, if desired, C) and, if desired, D) were applied in theformulation in which they are present as commercially available product.

The herbicidally active compounds of the groups A), B) and, if desired,C) and, if desired, D) were applied in succession or jointly, in thelatter case in some cases as a tank mix and in some cases as a readymix,in the form of emulsions, aqueous solutions or suspensions, the vehiclebeing water (300-400 l/ha). In the case of the field trials, applicationwas effected with the aid of a mobile plot sprayer.

The test period extended over 3 to 8 weeks, and the stands were alsoobserved at later points in time.

Damage by the herbicidal compositions was evaluated with reference to ascale of 0% to 100% in comparison with untreated control plots. 0 meansno damage and 100 means complete destruction of the plants.

The following examples will demonstrate the action of the herbicidalcompositions which can be used according to the invention, withoutexcluding the possibility of other uses.

In these examples, the value E at which only an additive effect of theindividual active ingredients is to be expected was calculated by themethod of S. R. Colby (Calculating synergistic and antagonisticresponses of herbicide combinations, Weeds 15, 20 pp (1967)).

This was done using the formula $E = {X + Y - \frac{XY}{100}}$

where

-   -   X=Percentage of the herbicidal action of the compound of        group A) at an application rate of a;    -   Y=Percentage of the herbicidal action of the compound of        group B) at an application rate of b;    -   E=expected herbicidal action of the compounds of the groups        A)+B) at rates of application a+b (in %).

If the value observed exceeds the value E calculated in accordance withColby's formula, then synergism is present.

The herbicidal mixtures according to the invention, like picolinafen andchlorsulfuron or picolinafen and triasulfuron at appropriate applicationrates under post emergence conditions, exert a greater herbicidal actionthan would have been expected according to Colby on the basis of theobserved effects of the individual components when used alone.

1. A synergistic herbicidal mixture comprising A) picolinafen (I)

or one of its environmentally compatible salts; and B) a synergistically effective amount of at least one sulfonylurea of formula II

wherein A is A1, A2, A3, A4 or A5

wherein R⁴ is halogen, C₁-C₄-haloalkyl, C₁-C₄-alkoxy, C₁-C₄-haloalkoxy, C₁-C₂-alkoxy-C₁-C₄-alkoxy, cyclopropylcarbonyl, di(C₁-C₄-alkyl)-aminocarbonyl or hydroxycarbonyl; R⁵ is hydrogen, halogen or C₁-C₄-alkylsulfonylamino-C₁-C₄-alkyl; R⁶ is hydroxycarbonyl or C₁-C₄-alkylsulfonyl; R⁷ is hydrogen or C₁-C₄-haloalkyl; R⁸ is hydroxycarbonyl; R⁹ is 2-methyl-tetrazol-5-yl or hydroxycarbonyl; R¹⁰ is hydrogen or halogen; R¹¹ is C₁-C₄-alkyl; R¹² is halogen or C₁-C₄-alkylsulfonyl; B is —O—, —NH—, —CH₂— or a bond; R¹ is hydrogen or C₁-C₄-alkyl; R² is halogen, C₁-C₄-alkyl, C₁-C₄-haloalkyl, C₁-C₄-alkoxy, C₁-C₄-haloalk-oxy, C₁-C₄-alkylamino or di(C₁-C₄-alkyl)amino; R³ is C₁-C₄-alkyl, C₁-C₄-haloalkoxy or C₁-C₄-alkoxy; X is CH or N; or one of its environmentally compatible salts or esters; and, if desired, C) at least a safener selected from the group consisting of dichlormid, benoxacor, LAB 145 138, MG-191, furilazole, cyometrinil, oxabetrinil, fluxofenim, flurazole, naphthalic acid anhydride, fenclorim, fenchlorazole-ethyl, mefenpyr, isoxa-difen, cloquintocet, 1 -ethyl-4-hydroxy-3(1H-tetrazol-5-yl)-1H-quinolin-2-one, 4-carboxymethyl-chroman-4-carboxylic acid, N-(2-methoxybenzyl)-4-(3-methylureido)-benzenesulfonamide and (3-oxo-isothio-chroman-4-ylidenmethoxy)acetic acid methyl ester; or an environmentally compatible salt, ester or amide thereof.
 2. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea of formula II, wherein A is A1, wherein R⁴ is halogen, C₁-C₃-haloalkyl, C₁-C₂-alkoxy, C₁-C₂-halo-alkoxy, C₁-C₂-alkoxy-C₁-C₂-alkoxy cyclopropylcarbonyl, di(C₁-C₂-alkyl)amino-carbonyl, hydroxycarbonyl or methoxycarbonyl, ethoxycarbonyl or oxetan-3-yloxycarbonyl; R⁵ is hydrogen, halogen, or C₁-C₂-alkylsulfonylamino-C₁-C₂-alkyl; R¹ is hydrogen; or C₁-C₂-alkyl; R² is halogen, C₁-C₂-alkyl, C₁-C₂-haloalkyl, C₁-C₂-alkoxy, C₁-C₂-haloalkoxy, C₁-C₂-alkylamino, or di(C₁-C₂-alkyl)-amino; R³ is C₁-C₂-alkyl, C₁-C₃-alkoxy, or C₁-C₂-haloalkoxy; X is CH or N; or one of its environmentally compatible salts;
 3. A synergistic herbicidal mixture as claimed in claim 1 comprising, as a component B) at least one sulfonylurea of formula II, wherein A is A2, wherein R⁶ is C₁-C₂-alkylsulfonyl, hydroxycarbonyl or methoxycarbonyl; R⁷ is hydrogen or C₁-C₂-haloalkyl; B is a bond; R¹ is hydrogen; R² is C₁-C₂-alkoxy; R³ is C₁-C₂-alkoxy; X is CH; or one of its environmentally compatible salts;
 4. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea of formula II wherein A is A3, wherein R⁸ is hydroxycarbonyl or methoxycarbonyl; B is a bond; R¹ is hydrogen; R² is C₁-C₂-alkyl; R³ is C₁-C₂-alkoxy; X is CH; or one of its environmentally compatible salts.
 5. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea of formula II wherein A is A4, wherein R⁹ is 2-methyl-tetrazol-5-yl, hydroxycarbonyl, methoxycarbonyl or ethoxycarbonyl; R¹⁰ is hydrogen, or halogen; R¹¹ is C₁-C₂-alkyl; B is a bond; R¹ is hydrogen; R² is C₁-C₂-alkoxy; R³ is C₁-C₂-alkoxy; X is CH; or one of its environmentally compatible salts.
 6. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea of formula II wherein A is A5, wherein R¹² is halogen , preferably chlorine; or C₁-C₂-alkyl-sulfonyl; B is a bond; R¹ is hydrogen; R² is C₁-C₂-alkoxy; R³ is C₁-C₂-alkoxy; X is CH; or one of its environmentally compatible salts.
 7. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea selected from the group consisting of azimsulfuron, bensulfuron, chlorimuron, chlorsulfuron, cinosulfuron, cyclosulfamuron, ethametsulfuron, ethoxysulfuron, flazasulfuron, flupyrsulfuron, halosulfuron, imazosulfuron, iodosulfuron, mesosulfuron, metsulfuron, nicosulfuron, primisulfuron, prosulfuron, pyrazosulfuron, rimsulfuron, sulfometuron, sulfosulfuron, thifensulfuron, triasulfuron, tribenuron, triflusulfuron, trifloxysulfuron and tritosulfuron, or an environmentally compatible salts or esters thereof.
 8. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea selected from the group consisting of azimsulfuron, bensulfuron, chlorimuron, chlorsulfuron, cyclosulfamuron, ethametsulfuron, ethoxysulfuron, flazasulfuron, flupyrsulfuron, halosulfuron, imazosulfuron, metsulfuron, nicosulfuron, primisulfuron, prosulfuron, pyrazosulfuron, rimsulfuron, sulfometuron, sulfosulfuron, thifensulfuron, triasulfuron, tribenuron, triflusulfuron, trifloxysulfuron and tritosulfuron, or an environmentally compatible salt or ester thereof.
 9. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea selected from the group consisting of azimsulfuron, bensulfuron, chlorimuron, chlorsulfuron, cyclosulfamuron, ethametsulfuron, ethoxysulfuron, flazasulfuror, halosulfuron, imazosulfuron, nicosulfuron, primisulfuron, prosulfuron, pyrazosulfuron, rimsulfuron, sulfometuron, triasulfuron and triflusulfuron, or an environmentally compatible salt or ester thereof.
 10. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea selected from the group consisting of chlorsulfuron, flupyrsulfuron, iodosulfuron, mesosulfuron, metsulfuron, prosulfuron, sulfosulfuron, thifensulfuron, triasulfuron, tribenuron, and tritosulfuron, or an environmentally compatible salt or ester thereof.
 11. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea selected from the group consisting of chlorsulfuron, flupyrsulfuron, metsulfuron, prosulfuron, sulfosulfuron, thifensulfuron, triasulfuron, tribenuron, and tritosulfuron, or an environmentally compatible salt or ester thereof.
 12. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component B) at least one sulfonylurea selected from the group consisting of chlorsulfuron, prosulfuron and triasulfuron, or an environmentally compatible salt or ester thereof.
 13. A synergistic herbicidal mixture as claimed in claim 1 comprising, as component C) cloquintocet, isoxadifen or mefenpyr.
 14. A synergistic herbicidal mixture as claimed in claim 1, additionally comprising as component D) an acetyl-CoA carboxylase inhibitor (ACC), acetolactate synthase inhibitor (ALS), amide, auxin herbicide, auxin transport inhibitor, carotenoid biosynthesis inhibitor, enolpyruvylshikimate 3-phosphate synthase inhibitor (EPSPS), glutamine synthetase inhibitor, lipid biosynthesis inhibitor, mitosis inhibitor, protoporphyrinogen IX oxidase inhibitor, photosynthesis inhibitor, synergist, growth substance, cell wall biosynthesis inhibitor or another herbicide.
 15. A synergistic herbicidal mixture as claimed in claim 1 comprising as active ingredients only picolinafen and one compound of group B).
 16. A synergistic herbicidal mixture as claimed in claim 1 comprising as active ingredients only picolinafen, one compound of group B) and one compound of group C).
 17. A synergistic herbicidal mixture as claimed in claim 1 wherein the ratios of the compounds of the groups A) and B) range from 1:0.0002 to 1:50.
 18. A synergistic herbicidal mixture as claimed in claim 1 wherein the ratios of the compounds of the groups A) and C) range from 1:0.0002 to 1:50.
 19. A herbicidal composition comprising a herbicidally active amount of a synergistic herbicidal mixture as claimed in claim 1, at least one liquid and/or solid carrier and, if desired, at least one surfactant.
 20. A process for the preparation of a herbicidal composition as claimed in claim 18, comprising mixing the compounds of group A), B), if desired, C), if desired, D), at least one liquid and/or solid carrier and, if desired, at least one surfactant.
 21. A method for controlling undesired vegetation, which comprises applying to undesired plants a synergistic herbicidal mixture as claimed in claim 1, during and/or after the emergence of the undesired plants, it being possible for the active compounds of the groups A), B), if desired, C) and, if desired D) to be applied simultaneously or in succession.
 22. A method for controlling undesired vegetation comprising simultaneously or successively applying to undesired plants, their habitation or their seeds A) picolinafen (I)

or one of its environmentally compatible salts; and B) a synergistically effective amount of at least one sulfonylurea of formula 11

wherein A is A1, A2, A3, A4 or A5

wherein R⁴ is halogen, C₁-C₄-haloalkyl, C₁-C₄-alkoxy, C₁-C₄-haloalkoxy, C₁-C₂-alkoxy-C₁-C₄-alkoxy, cyclopropylcarbonyl, di(C₁-C₄-alkyl)-aminocarbonyl or hydroxycarbonyl; R⁵ is hydrogen, halogen or C₁-C₄-alkylsulfonylamino-C₁-C₄-alkyl; R⁶ is hydroxycarbonyl or C₁-C₄-alkylsulfonyl; R⁷ is hydrogen or C₁-C₄-haloalkyl; R⁸ is hydroxycarbonyl; R⁹ is 2-methyl-tetrazol-5-yl or hydroxycarbonyl; R¹⁰ is hydrogen or halogen; R¹¹ is C₁-C₄-alkyl; R¹² is halogen or C₁-C₄-alkylsulfonyl; B is —O—, —NH—, —CH₂— or a bond; R¹ is hydrogen or C₁-C₄-alkyl; R² is halogen, C₁-C₄-alkyl, C₁-C₄-haloalkyl, C₁-C₄-alkoxy, C₁-C₄-haloalk-oxy, C₁-C₄-alkylamino or di(C₁-C₄-alkyl)amino; R³ is C₁-C₄-alkyl, C₁-C₄-haloalkoxy or C₁-C₄-alkoxy; X is CH or N; or one of its environmentally compatible salts or esters; and, if desired, C) at least a safener selected from the group consisting of dichlormid, benoxacor, LAB 145 138, MG-191, furilazole, cyometrinil, oxabetrinil, fluxofenim, flurazole, naphthalic acid anhydride, fenclorim, fenchlorazole-ethyl, mefenpyr, isoxa-difen, cloquintocet, 1-ethyl-4-hydroxy-3(1H-tetrazol-5-yl)-1H-quinolin-2-one, 4-carboxymethyl-chroman-4-carboxylic acid, N-(2-methoxybenzyl)-4-(3-methylureido)-benzenesulfonamide and (3-oxo-isothio-chroman-4-ylidenmethoxy)acetic acid methyl ester; or one of its environmentally compatible salts, esters or amides. 